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WoS SCOPUS Document Type Document Title Abstract Authors Affiliation ResearcherID (WoS) AuthorsID (SCOPUS) Author Email(s) Journal Name JCR Abbreviation ISSN eISSN Volume Issue WoS Edition WoS Category JCR Year IF JCR (%) FWCI FWCI Update Date WoS Citation SCOPUS Citation Keywords (WoS) KeywordsPlus (WoS) Keywords (SCOPUS) KeywordsPlus (SCOPUS) Language Publication Stage Publication Year Publication Date DOI JCR Link DOI Link WOS Link SCOPUS Link
Article Widespread somatic L1 retrotransposition in normal colorectal epithelium Throughout an individual's lifetime, genomic alterations accumulate in somatic cells(1-11). However, the mutational landscape induced by retrotransposition of long interspersed nuclear element-1 (L1), a widespread mobile element in the human genome(12-14), is poorly understood in normal cells. Here we explored the whole-genome sequences of 899 single-cell clones established from three different cell types collected from 28 individuals. We identified 1,708 somatic L1 retrotransposition events that were enriched in colorectal epithelium and showed a positive relationship with age. Fingerprinting of source elements showed 34 retrotransposition-competent L1s. Multidimensional analysis demonstrated that (1) somatic L1 retrotranspositions occur from early embryogenesis at a substantial rate, (2) epigenetic on/off of a source element is preferentially determined in the early organogenesis stage, (3) retrotransposition-competent L1s with a lower population allele frequency have higher retrotransposition activity and (4) only a small fraction of L1 transcripts in the cytoplasm are finally retrotransposed in somatic cells. Analysis of matched cancers further suggested that somatic L1 retrotransposition rate is substantially increased during colorectal tumourigenesis. In summary, this study illustrates L1 retrotransposition-induced somatic mosaicism in normal cells and provides insights into the genomic and epigenomic regulation of transposable elements over the human lifetime. Nam, Chang Hyun; Youk, Jeonghwan; Kim, Jeong Yeon; Lim, Joonoh; Park, Jung Woo; Oh, Soo A.; Lee, Hyun Jung; Park, Ji Won; Won, Hyein; Lee, Yunah; Jeong, Seung-Yong; Lee, Dong-Sung; Oh, Ji Won; Han, Jinju; Lee, Junehawk; Kwon, Hyun Woo; Kim, Min Jung; Ju, Young Seok Korea Adv Inst Sci & Technol, Grad Sch Med Sci & Engn, Daejeon, South Korea; Genome Insight Inc, Daejeon, South Korea; Seoul Natl Univ Hosp, Dept Internal Med, Seoul, South Korea; Korea Inst Sci & Technol Informat, Daejeon, South Korea; Seoul Natl Univ, Coll Med, Dept Surg, Seoul, South Korea; Univ Seoul, Dept Life Sci, Seoul, South Korea; Kyungpook Natl Univ, Sch Med, Dept Anat, Daegu, South Korea; Yonsei Univ, Coll Med, Dept Anat, Seoul, South Korea; Korea Univ, Coll Med, Dept Nucl Med, Seoul, South Korea ; Oh, Ji/AAZ-3153-2020; Han, Jinju/D-9091-2017; Ryu, Wang-Shick/I-4518-2019; Kim, Joo-Sik/K-7230-2012; Ju, Young/E-1324-2012; Ju, Young Seok/E-1324-2012; Lee, Jung/H-5563-2017; Kwon, Hyun/AAX-7752-2020; Jeong, Seung-Yong/J-5643-2012; KIM, MINJUNG/JPK-2924-2023 57772369400; 56966371400; 59561899000; 57221473555; 57221478660; 57232605300; 56642888000; 57222044570; 58245985900; 57221968558; 7402425099; 57747208000; 36093206200; 7406443048; 24343905100; 26646714300; 56984393300; 25947457600 hnwoo@korea.ac.kr;minjungkim@snuh.org;ysju@kaist.ac.kr; NATURE NATURE 0028-0836 1476-4687 617 7961 SCIE MULTIDISCIPLINARY SCIENCES 2023 50.5 0.4 2.83 2025-06-25 26 26 DNA METHYLATION DYNAMICS; ADULT STEM-CELLS; MUTATION ACCUMULATION; GENOME; LANDSCAPE; SIGNATURES; DISCOVERY; MECHANISM; ELEMENTS; REVEAL Carcinogenesis; Colorectal Neoplasms; DNA Transposable Elements; Genomics; Humans; Long Interspersed Nucleotide Elements; allele; cancer; cell; cytoplasm; induced response; adolescent; adult; age; allele; Article; cell cloning; child; cohort analysis; embryo development; epigenetics; female; gene control; genetic fingerprinting; genetic transcription; genomics; human; human cell; lifespan; male; mosaicism; organogenesis; preschool child; rectum epithelium; retroposon; single cell analysis; somatic cell; whole genome sequencing; young adult; carcinogenesis; colorectal tumor; DNA transposon; genetics; long interspersed nuclear element English 2023 2023-05-18 10.1038/s41586-023-06046-z 바로가기 바로가기 바로가기 바로가기
Article Analgesic effects of combined transversus abdominis plane block and intramuscular electrical stimulation in patients undergoing cytoreductive surgery followed by hyperthermic intraperitoneal chemotherapy: a randomized controlled trial Background: To evaluate the analgesic efficacy of a four-quadrant transversus abdominis plane (4QTAP) block and a combination of 4QTAP block with needle electrical twitch and intramuscular electrical stimulation (NETOIMS) in patients undergoing cytoreductive surgery (CRS) followed by hyperthermic intraperitoneal chemotherapy (HIPEC). Materials and Methods: Eighty-one patients who underwent CRS followed by HIPEC were included in this study. Patients were randomly assigned to one of three groups: group 1 (intravenous patient-controlled analgesia, control group), group 2 (preoperative 4QTAP block), and group 3 (preoperative 4QTAP block and postoperative NETOIMS). The primary study endpoint was the pain score assessed by the visual analog scale (VAS: 0, no pain; 10, worst imaginable pain) on postoperative day (POD) 1. Results: The VAS pain score on POD 1 was significantly lower in group 2 than in group 1 (6.0 +/- 1.7 and 7.6 +/- 1.9, P = 0.004), whereas that in group 3 was significantly lower than that in groups 1 and 2 (P < 0.001 and P = 0.004, respectively). Opioid consumption and nausea and vomiting incidence during POD 7 were significantly lower in group 3 than in groups 1 and 2. Gait speed and peak cough flow on POD 4 and 7, as well as the quality of recovery (QoR)-40 score on POD 4, were significantly higher in group 3 than in groups 1 and 2. Conclusions: The combination of a 4QTAP block with NETOIMS provided more effective analgesia than a 4QTAP block alone after CRS, followed by HIPEC, and enhanced functional restoration and quality of recovery. Kim, Hyun-Chang; Park, Jinyoung; Oh, Jinyoung; Kim, Minjae; Park, Eun Jung; Baik, Seung Hyuk; Song, Young Anesthesia & Pain Res Inst, Dept Anesthesiol & Pain Med, Seoul, South Korea; Gangnam Severance Hosp, Dept Rehabil, Seoul, South Korea; Yonsei Univ, Coll Med, Dept Anesthesiol & Pain Med, Seoul, South Korea; Yonsei Univ, Gangnam Severance Hosp, Dept Surg, Div Colon & Rectal Surg,Coll Med, Seoul, South Korea; Kyungpook Natl Univ, Chilgok Hosp, Sch Med, Dept Anesthesiol & Pain Med, Daegu, South Korea Song, Young Goo/AGV-5104-2022; PARK, JUN-YOUNG/P-5981-2015; Kim, Hyun-Chang/G-6624-2015; Park, Eun/W-1340-2019 57218663156; 57193534634; 57609999900; 58288608400; 56072952500; 57293077900; 59887701500 onidori1979@gmail.com;pjyblue511@gmail.com;sgcms3@gmail.com;byeminjae@yuhs.ac;camp79@yuhs.ac;whitenoja@yuhs.ac;nearmyheart@yuhs.ac; INTERNATIONAL JOURNAL OF SURGERY INT J SURG 1743-9191 1743-9159 109 5 SCIE SURGERY 2023 12.5 0.5 0.26 2025-06-25 1 1 analgesia; cytoreductive surgery; hyperthermic intraperitoneal chemotherapy; intramuscular electrical stimulation; recovery; transabdominal plane block BIOCHEMICAL MILIEU; PAIN; CARE Abdominal Muscles; Analgesics, Opioid; Cytoreduction Surgical Procedures; Fever; Humans; Nerve Block; Pain, Postoperative; narcotic analgesic agent; abdominal wall musculature; controlled study; cytoreductive surgery; fever; human; nerve block; postoperative pain; randomized controlled trial English 2023 2023-05 10.1097/js9.0000000000000383 바로가기 바로가기 바로가기 바로가기
Review Bioprocessing of plastics for sustainable environment: Progress, challenges, and prospects Environmental biotic and abiotic components are threatened by the continuous use, accumulation, and contamination of plastics. Additionally, it contributes to global warming by increasing carbon footprints. Plastic degradation using physicochemical methods has proved to be ineffective and release potentially harmful byproducts. A novel strategy for the efficient degradation of plastics is therefore urgently needed. Microbial degradation of plastics and converting them into value-added products is more promising for a sustainable ecosystem. The review provides a comprehensive summary of the current state of microbial technologies for the degradation of different types of plastics. The study elucidates the mechanism of plastics decomposition with an emphasis on the genetic improvement of the microbial strains for effective biodegradation. Further, the fate of the microbially degraded plastic materials as suitable precursors for the synthesis of high-value products is highlighted. Finally, the challenges and directions for future research on microbial degradation of plastics are discussed. Rambabu, K.; Bharath, G.; Govarthanan, Muthusamy; Kumar, P. Senthil; Show, Pau Loke; Banat, Fawzi Khalifa Univ, Dept Chem Engn, POB 127788, Abu Dhabi, U Arab Emirates; Khalifa Univ, Dept Chem, POB 127788, Abu Dhabi, U Arab Emirates; Kyungpook Natl Univ, Dept Environm Engn, Daegu 41566, South Korea; Saveetha Univ, Saveetha Inst Med & Tech Sci, Saveetha Dent Coll & Hosp, Dept Biomat, Chennai 600077, Tamil Nadu, India; Sri Sivasubramaniya Nadar Coll Engn, Dept Chem Engn, Kalavakkam 603110, Tamil Nadu, India; Sri Sivasubramaniya Nadar Coll Engn, Ctr Excellence Water Res CEWAR, Kalavakkam 603110, Tamil Nadu, India; Lebanese Amer Univ, Sch Engn, Byblos, Lebanon Krishnamoorthy, Rambabu/AAA-9794-2022; Pau Loke, Show/A-7953-2015; govindan, Bharath/X-6375-2019; Muthusamy, Govarthanan/C-1491-2014; Senthil Kumar, P./D-1869-2012 56009167700; 45060923000; 54881927600; 24074610000; 47861451300; 7006459182 rambabu.krishnamoorthy@ku.ac.ae; TRAC-TRENDS IN ANALYTICAL CHEMISTRY TRAC-TREND ANAL CHEM 0165-9936 1879-3142 166 SCIE CHEMISTRY, ANALYTICAL 2023 11.8 0.5 1.03 2025-06-25 13 20 Plastics; Waste management; Sustainability; Microbial degradation; Bioengineering FRESH-WATER ECOSYSTEMS; PRETREATED POLYPROPYLENE; BIODEGRADATION; DEGRADATION; PSEUDOMONAS; POLYURETHANE; MICROPLASTICS; POLYETHYLENE; POLYSTYRENE; SURFACE Bioengineering; Microbial degradation; Plastics; Sustainability; Waste management Biodegradable polymers; Biodegradation; Carbon footprint; Elastomers; Global warming; Plastic products; Waste management; plastic; polyethylene; polyethylene terephthalate; polystyrene; polyurethan; polyvinylchloride; Bioengineering; Bioprocessing; Biotics; Microbial degradation; Novel strategies; Physicochemical methods; Plastic degradation; Sustainable ecosystems; Sustainable environment; Value added products; Achroia grisella; biodegradation; bioprocess; Clitocybe; Clostridium thermocellum; Cobetia; decomposition; degradation; Enterobacter; environmental sustainability; Exiguobacterium sibiricum; genetic modification; green chemistry; microbial degradation; microbiology; molecular dynamics; nonhuman; Pseudomonas; Pseudomonas aeruginosa; Review; Serratia plymuthica; Streptomyces scabiei; synthesis; Vibrio; waste management; waste valorization; Sustainable development English 2023 2023-09 10.1016/j.trac.2023.117189 바로가기 바로가기 바로가기 바로가기
Article Acceleration of aging behavior and improvement of mechanical properties of extruded AZ80 alloy through (10-12) twinning The effects of pre-existing {10-12} extension twins on the precipitation behavior of an extruded AZ80 material during aging and on its mechanical properties after peak aging are investigated. The material containing {10-12} twins-which are formed by compression before aging (twinned material)-has a finer grain size and higher dislocation density than the extruded material. Although the peak hardnesses of the twinned and extruded materials are almost the same, the time to reach the peak hardness is considerably shorter in the former material than in the latter (4 h and 24 h, respectively). In the twinned material, the high dislocation density of the {10-12} twins promotes continuous precipitation, which results in the formation of numerous fine Mg 17 Al 12 precipitates within the twins in the early stage of aging. The formation of these continuous precipitates reduces the driving force for discontinuous precipitation, which consequently suppresses the formation and growth of coarse Mg 17 Al 12 precipitates at the grain boundaries. Despite its shorter peak-aging time, the 4 h-peak-aged twinned material shows higher tensile strength and elongation than the 24 h-peak-aged extruded material. These higher mechanical properties of the former material are attributed primarily to the presence of more abundant fine continuous precipitates, which are effective in strengthening the material, and less abundant coarse discontinuous precipitates, which can act as crack initiation sites. These results demonstrate that the introduction of {10-12} twins into wrought Mg-Al-based alloys can accelerate the Mg 17 Al 12 precipitation kinetics considerably and improve the strength and ductility of the peak-aged alloys simultaneously.(c) 2021 Chongqing University. Publishing services provided by Elsevier B.V. on behalf of KeAi Communications Co. Ltd. This is an open access article under the CC BY-NC-ND license ( http://creativecommons.org/licenses/by-nc-nd/4.0/ ) Peer review under responsibility of Chongqing University Kim, Hyun Ji; Kim, Ye Jin; Park, Sung Hyuk Kyungpook Natl Univ, Sch Mat Sci & Engn, Daegu 41566, South Korea Kim, Hyunjin/MDS-5282-2025; Park, Sung-Hyuk/AAE-6726-2022 59866513600; 59052467200; 54786002500 sh.park@knu.ac.kr; JOURNAL OF MAGNESIUM AND ALLOYS J MAGNES ALLOY 2213-9567 11 2 SCIE METALLURGY & METALLURGICAL ENGINEERING 2023 15.8 0.6 4.58 2025-06-25 35 39 AZ80 alloy; Twin; Aging; Precipitation; Tensile properties ROLLED MG-3AL-1ZN ALLOY; BINARY MG-AL; MAGNESIUM ALLOY; DISCONTINUOUS PRECIPITATION; STRETCH FORMABILITY; CYCLIC DEFORMATION; TEXTURE EVOLUTION; GRAIN-REFINEMENT; STACKING-FAULTS; STRAIN Aging; AZ80 alloy; Precipitation; Tensile properties; Twin Aging; Behavior; Density; Formation; Grain; Mechanical Properties; Precipitates; Precipitation; Aluminum alloys; Binary alloys; Grain boundaries; Hardness; Magnesium alloys; Tensile strength; After-peaks; Ageing behavior; Az80 alloy; Extruded materials; High dislocation density; Peak aged; Peak aging; Peak hardness; Precipitation behaviour; Twin; Precipitation (chemical) English 2023 2023-02 10.1016/j.jma.2021.09.008 바로가기 바로가기 바로가기 바로가기
Article Comparative study of extrudability, microstructure, and mechanical properties of AZ80 and BA53 alloys The extrudability, microstructural characteristics, and tensile properties of the Mg-5Bi-3Al (BA53) alloy are investigated herein by comparing them with those of a commercial Mg-8Al-0.5 Zn (AZ80) alloy. When AZ80 is extruded at 400 degrees C, severe hot cracking occurs at exit speeds of 4.5 m/min or more. In contrast, BA53 is successfully extruded without any surface cracking at 400 degrees C and at high exit speeds of 21-40 m/min. When extruded at 3 m/min (AZ80-3) and 40 m/min (BA53-40), both AZ80 and BA53 exhibited completely recrystallized microstructures with a basal texture. However, BA53-40 has a coarser grain structure owing to grain growth promoted by the high temperature in the deformation zone. AZ80-3 contains a continuous network of Mg17Al12 particles along the grain boundaries, which form via static precipitation during natural air-cooling after the material exits the extrusion die. BA53-40 contains coarse Mg3Bi2 particles aligned parallel to the extrusion direction along with numerous uniformly distributed fine Mg3Bi2 particles. AZ80-3 has higher tensile strength than BA53-40 because the relatively finer grains and larger number of solute atoms in AZ80-3 result in stronger grain-boundary and solid-solution hardening effects, respectively. Although BA53 is extruded at a high temperature and extrusion speed of 400 degrees C and 40 m/min, respectively, the extruded material has a high tensile yield strength of 188 MPa. This can be primarily attributed to the large particle hardening effect resulting from the numerous fine Mg3Bi2 particles. (c) 2021 Chongqing University. Publishing services provided by Elsevier B.V. on behalf of KeAi Communications Co. Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer review under responsibility of Chongqing University Jin, Sang-Cheol; Cha, Jae Won; Go, Jongbin; Bae, Jun Ho; Park, Sung Hyuk Kyungpook Natl Univ, Sch Mat Sci & Engn, Daegu 41566, South Korea; Kyoto Univ, Dept Mat Sci & Engn, Kyoto 6068501, Japan; Korea Inst Mat Sci, Adv Met Div, Chang Won 51508, South Korea Park, Sung-Hyuk/AAE-6726-2022 57198914140; 57221282466; 57204606110; 36900467300; 54786002500 sh.park@knu.ac.kr; JOURNAL OF MAGNESIUM AND ALLOYS J MAGNES ALLOY 2213-9567 11 1 SCIE METALLURGY & METALLURGICAL ENGINEERING 2023 15.8 0.6 3.57 2025-06-25 37 34 Mg-Bi-Al alloy; Extrusion; Hot cracking; Second phase; Tensile properties DYNAMIC RECRYSTALLIZATION; PLASTIC-DEFORMATION; MAGNESIUM ALLOY; GRAIN-SIZE; MG-ALLOYS; EXTRUSION; TEMPERATURE; EVOLUTION; SPEED; PREDICTION Extrusion; Hot cracking; Mg–Bi–Al alloy; Second phase; Tensile properties Alloy; Celtis; Extrusion; Hardening; High Temperature; Particles; Sterculia; Age hardening; Aluminum alloys; Binary alloys; Bismuth alloys; Cracks; Grain boundaries; Grain growth; Magnesium alloys; Precipitation (chemical); Tensile strength; Textures; Zinc alloys; Al-alloy; Comparatives studies; Extrudability; Grain-boundaries; Hardening effects; Highest temperature; Hot-cracking; Mg–bi–al alloy; Microstructures and mechanical properties; Second phase; Extrusion English 2023 2023-01 10.1016/j.jma.2021.07.009 바로가기 바로가기 바로가기 바로가기
Article Development of 3D bicontinuous metal-intermetallic composites through subsequent alloying process after liquid metal dealloying This study presents a novel process for the fabrication of metal-intermetallic composites with a 3D bicontinuous structure, achieved through a combination of liquid metal dealloying (LMD) and subsequent alloying. Initially, porous Ti structures are produced using the LMD process, followed by immersion in a molten Mg-3Al (wt%) metal. Due to the higher thermodynamic miscibility of Al with Ti compared to Mg, the concentration of Al in the Ti matrix increases as the immersion time increases. This results in a sequential phase transition within the Ti matrix: alpha-Ti -> Ti3 Al -> TiAl. The phase transition considerably affects the hardness and strength of the composite material, with the Mg-Ti3 Al-TiAl composite exhibiting a maximum hardness nearly twice as high as that of the conventional Mg-Ti composite. This innovative process holds potential for the development of various bicontinuous metal-intermetallic composites. (c) 2023 Chongqing University. Publishing services provided by Elsevier B.V. on behalf of KeAi Communications Co. Ltd. This is an open access article under the CC BY-NC-ND license ( http://creativecommons.org/licenses/by-nc-nd/4.0/ ) Peer review under responsibility of Chongqing University Jang, Jee Eun; Seong, Jihye; Joo, Soo-Hyun; Park, Sung Hyuk Kyungpook Natl Univ, Sch Mat Sci & Engn, Daegu 41566, South Korea; Dankook Univ, Dept Mat Sci & Engn, Cheonan 31116, South Korea ; Seong, Jihye/NKP-0911-2025; Park, Sung-Hyuk/AAE-6726-2022; joo, soohyun/E-8292-2013 57660564800; 58338374700; 35738843100; 54786002500 jjsh83@dankook.ac.kr;sh.park@knu.ac.kr; JOURNAL OF MAGNESIUM AND ALLOYS J MAGNES ALLOY 2213-9567 11 11 SCIE METALLURGY & METALLURGICAL ENGINEERING 2023 15.8 0.6 0.38 2025-06-25 3 3 Liquid metal dealloying; Subsequent alloying; Metal - intermetallic composite; 3D bicontinuous structure; Hardness MATRIX COMPOSITES; NANOPOROUS METALS; TITANIUM-ALLOY; EVOLUTION; KINETICS; MG; FABRICATION; AU; AL; CU 3D bicontinuous structure; Hardness; Liquid metal dealloying; Metal–intermetallic composite; Subsequent alloying Aluminum; Binary alloys; Dealloying; Hardness; Intermetallics; Liquid metals; Phase transitions; Titanium; 3d bicontinuous structure; Alloying process; Bicontinuous; Bicontinuous structures; Dealloying; Intermetallic composites; Liquid metal dealloying; matrix; Metal–intermetallic composite; Subsequent alloying; Alloying English 2023 2023-11 10.1016/j.jma.2023.09.028 바로가기 바로가기 바로가기 바로가기
Article Difference in extrusion temperature dependences of microstructure and mechanical properties between extruded AZ61 and AZ91 alloys The effects of extrusion temperature on the microstructure and tensile properties of extruded AZ61 and AZ91 alloys are investigated by subjecting them to hot extrusion at 300 and 400 & DEG;C. Although the average grain size of the extruded AZ61 alloy slightly increases from 9.5 to 12.6 & mu;m with increasing extrusion temperature, its resultant microstructural variation is insignificant. In contrast, the average grain size of the extruded AZ91 alloy significantly increases from 5.7 to 22.5 & mu;m with increasing extrusion temperature, and the type of Mg17Al12 precipitates formed in it changes from fine dynamic precipitates with a spherical shape to coarse static precipitates with a lamellar structure. As the extrusion temperature increases, the tensile yield strength of the extruded AZ61 alloy increases from 183 to 197 MPa while that of the extruded AZ91 alloy decreases from 232 to 224 MPa. The tensile elongations of the extruded AZ61 and AZ91 alloys decrease with increasing extrusion temperature, but the degree of decrease is significant in the latter alloy. These different extrusion temperature dependences of the tensile properties of the extruded AZ61 and AZ91 alloys are discussed in terms of their microstructural characteristics, strengthening mechanisms, and crack initiation sites.& COPY; 2022 Chongqing University. Publishing services provided by Elsevier B.V. on behalf of KeAi Communications Co. Ltd. This is an open access article under the CC BY-NC-ND license ( http://creativecommons.org/licenses/by-nc-nd/4.0/ ) Peer review under responsibility of Chongqing University Lee, Dong Hee; Lee, Gyo Myeong; Park, Sung Hyuk Kyungpook Natl Univ, Sch Mat Sci & Engn, Daegu 41566, South Korea ; Park, Sung-Hyuk/AAE-6726-2022 57218922670; 57222810183; 54786002500 sh.park@knu.ac.kr; JOURNAL OF MAGNESIUM AND ALLOYS J MAGNES ALLOY 2213-9567 11 5 SCIE METALLURGY & METALLURGICAL ENGINEERING 2023 15.8 0.6 5.35 2025-06-25 41 45 Mg-Al-Zn alloys; Extrusion temperature; Precipitation; Strengthening mechanism; Tensile properties AL-ZN ALLOY; MAGNESIUM ALLOY; GRAIN-SIZE; DYNAMIC RECRYSTALLIZATION; DEFORMATION-BEHAVIOR; TENSILE PROPERTIES; YIELD ASYMMETRY; AZ31 ALLOY; TEXTURE; STRENGTH Extrusion temperature; Mg–Al–Zn alloys; Precipitation; Strengthening mechanism; Tensile properties Alloy; Decrements; Grain; Microstructure; Precipitates; Temperature; Tensile Properties; Aluminum alloys; Binary alloys; Extrusion; Grain size and shape; Lamellar structures; Magnesium alloys; Temperature distribution; Tensile strength; Zinc alloys; Average grain size; AZ91 alloy; Extrusion temperatures; Hot extrusion; Mg-Al -Zn alloys; Microstructural variation; Microstructures and mechanical properties; Spherical shape; Strengthening mechanisms; Temperature dependence; Precipitation (chemical) English 2023 2023-05 10.1016/j.jma.2022.05.015 바로가기 바로가기 바로가기 바로가기
Article Effects of surface roughness on bending properties of rolled AZ31 alloy This study investigated the effects of mechanical-polishing-induced surface roughness and the direction of polishing lines on the bending properties of a rolled AZ31 alloy. To this end, three-point bending tests were performed on one sample without polishing lines (SS sample) and two samples with polishing lines-one in which the polishing lines were parallel to the rolling direction (RS-RD sample) and the other in which they were parallel to the transverse direction (RS-TD sample). In all three samples, macrocracks were formed in the width direction on the outer surface, where tensile stress was predominantly generated in the longitudinal direction. However, the macrocracks formed in the SS sample were curved because of the merging of uniformly formed fine microcracks, whereas those formed in the RS-TD sample were linear owing to the formation of relatively coarse microcracks along the polishing lines. The bendability of the samples was in the order of SS > RS-RD > RS-TD, and their limiting bending depths were 4.8, 4.6, and 4.4 mm, respectively. In the presence of mechanical-polishing-induced surface roughness, polishing lines perpendicular to the direction of the major stress (i.e., tensile stress along the longitudinal direction) resulted in a greater degree of stress concentration on the outer surface of the bending specimen. This higher stress concentration promoted the formation of undesirable {10-11} contraction and {10-11}-{10-12} double twins-which typically act as crack initiation sites-and thereby facilitated crack generation and propagation. Consequently, the surface roughness caused premature fracture during bending deformation, which, in turn, caused deterioration of the bendability of the rolled Mg alloy.& COPY; 2022 Chongqing University. Publishing services provided by Elsevier B.V. on behalf of KeAi Communications Co. Ltd. This is an open access article under the CC BY-NC-ND license ( http://creativecommons.org/licenses/by-nc-nd/4.0/ ) Peer review under responsibility of Chongqing University Lee, Gyo Myeong; Lee, Jong Un; Park, Sung Hyuk Kyungpook Natl Univ, Sch Mat Sci & Engn, Daegu 41566, South Korea Park, Sung-Hyuk/AAE-6726-2022 57222810183; 57195056728; 54786002500 sh.park@knu.ac.kr; JOURNAL OF MAGNESIUM AND ALLOYS J MAGNES ALLOY 2213-9567 11 4 SCIE METALLURGY & METALLURGICAL ENGINEERING 2023 15.8 0.6 1.02 2025-06-25 9 10 AZ31 alloy; Bending; Surface roughness; Stress concentration; Crack MAGNESIUM ALLOY; MECHANICAL-PROPERTIES; MG ALLOY; MICROSTRUCTURE EVOLUTION; DEFORMATION BEHAVIORS; TENSILE DEFORMATION; TWIN BOUNDARY; AS-CAST; E-FORM; ROOM AZ31 alloy; Bending; Crack; Stress concentration; Surface roughness Alloy; Bending; Deformation; Polishing; Roughness; Samples; Stress Concentration; Surfaces; Bending (forming); Bending tests; Compressive stress; Deterioration; Magnesium alloys; Microcracks; Polishing; Stress concentration; Tensile stress; AZ31 alloy; Bending; Bending properties; Bending specimens; Longitudinal direction; Macrocrack; Mechanical polishing; Outer surface; Rolling direction; Three-point bending test; Surface roughness English 2023 2023-04 10.1016/j.jma.2021.11.029 바로가기 바로가기 바로가기 바로가기
Article Improved continuous precipitation kinetics and tensile properties of extruded AZ80 alloy through {10-12} twin formation This study investigates the effect of {10-12} deformation twins on the continuous precipitation behavior of an extruded Mg-8.0Al- 0.5Zn-0.2Mn (AZ80) alloy during aging. The extruded AZ80 alloy is compressed along the transverse direction to introduce {10-12} twins, followed by an aging treatment at 300 degrees C. The extruded material exhibits a twin-free microstructure with low internal strain energy, whereas the pre-twinned material possesses abundant {10-12} twins and has high internal strain energy. The aging results reveal that the peak-aging time of the pre-twinned material (1 h) is one-eighth of that of the extruded material (8 h). Although Mg17Al12 continuous precipitates (CPs) are observed in both the peak-aged materials, these CPs are much smaller and more densely distributed in the pre-twinned material despite the significantly shorter aging time. The CPs size in the peak-aged materials increases in the following order: twinned region in the pre-twinned material (0.47 mu m) m) m). Moreover, the CPs number density in the twinned region of the pre-twinned material is approximately 11 times higher than that in the matrix region of the extruded material. The peak-aged pre-twinned material exhibits significantly higher tensile strength and ductility than the peak-aged extruded material. These results demonstrate that the formation of {10-12} twins in the extruded AZ80 alloy substantially accelerates the static precipitation of CPs during aging at 300 degrees C and improves the tensile properties of the peak-aged material. (c) 2023 Chongqing University. Publishing services provided by Elsevier B.V. on behalf of KeAi Communications Co. Ltd. This is an open access article under the CC BY-NC-ND license ( http://creativecommons.org/licenses/by-nc-nd/4.0/ ) Peer review under responsibility of Chongqing University Kim, Hyun Ji; Jo, Sumi; Park, Sung Hyuk Kyungpook Natl Univ, Dept Mat Sci & Met Engn, Daegu 41566, South Korea Park, Sung-Hyuk/AAE-6726-2022; Kim, Hyunjin/MDS-5282-2025 59866513600; 56865369700; 54786002500 sumi.jo@knu.ac.kr;sh.park@knu.ac.kr; JOURNAL OF MAGNESIUM AND ALLOYS J MAGNES ALLOY 2213-9567 11 9 SCIE METALLURGY & METALLURGICAL ENGINEERING 2023 15.8 0.6 2.04 2025-06-25 12 17 AZ80 alloy; {10-12} twin; Aging; Continuous precipitation; Tensile properties ROLLED MG-3AL-1ZN ALLOY; MECHANICAL-PROPERTIES; MAGNESIUM ALLOY; MG ALLOY; DEFORMATION-BEHAVIOR; CORROSION BEHAVIOR; ROOM-TEMPERATURE; MG17AL12 PHASE; HEAT-TREATMENT; AZ91 Aging; AZ80 alloy; Continuous precipitation; Tensile properties; {10–12} twin Aging of materials; Aluminum alloys; Binary alloys; Magnesium alloys; Precipitation (chemical); Tensile strength; Aging time; Az80 alloy; Continuous precipitation; Extruded materials; Internal strains; Matrix regions; Peak aged; Precipitation kinetics; Twin formation; {10–12} twin; Strain energy English 2023 2023-09 10.1016/j.jma.2023.08.019 바로가기 바로가기 바로가기 바로가기
Article Membraneless unbuffered seawater electrolysis for pure hydrogen production using PtRuTiOx anode and MnOx cathode pairs Seawater electrolysis is promising as an in situ H-2 production method, allowing immediate overseas transport of the produced H-2. In this study, membraneless electrolysis of undisturbed, unbuffered seawater (pH 8.2) is proposed to produce high-purity H-2. A ternary Pt, Ru, and Ti (PRT) catalyst with a minimized Pt level (Pt0.06Ru0.24Ti0.7Ox) drives chloride oxidation reaction (ClOR) at a Faradaic efficiency (FE) of similar to 100% in saline water at current density (J) of 800 mA cm(-2) over 500 h. Chlorine reduction reaction (ClRR) is also inhibited on MnOx electrodes, leading to hydrogen evolution reaction (HER) at an FE of similar to 100% even in the presence of chlorine species (HClO/ClO-). Finally, the PRT anode/MnOx cathode pair is demonstrated to drives ClOR and HER at FEs of similar to 100% at J = 80 mA cm(-2) over 100 h in a single-compartment cell containing seawater. Oxygen evolution reaction and ClRR are completely inhibited during seawater electrolysis. Liang, Nan -Nan; Han, Dong Suk; Park, Hyunwoong Kyungpook Natl Univ, Sch Energy Engn, Daegu 41566, South Korea; Qatar Univ, Ctr Adv Mat, Doha 2713, Qatar Park, Hyunwoong/A-1247-2012; Han, Dong SuK/AAX-9333-2021; Han, Dong Suk/Q-8641-2017 57800564000; 36139213900; 7601565583 hwp@knu.ac.kr; APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY APPL CATAL B-ENVIRON 0926-3373 1873-3883 324 SCIE CHEMISTRY, PHYSICAL;ENGINEERING, CHEMICAL;ENGINEERING, ENVIRONMENTAL 2023 20.3 0.6 3.14 2025-06-25 31 32 Electrocatalyst; Selectivity; Chloride oxidation reaction; Oxygen evolution reaction; Hydrogen production reaction MOLECULAR-HYDROGEN; ELECTROCATALYTIC ACTIVITIES; OXIDATION; CHLORINE Chloride oxidation reaction; Electrocatalyst; Hydrogen production reaction; Oxygen evolution reaction; Selectivity Anodes; Cathodes; Chlorine; Chlorine compounds; Electrolysis; Hydrogen production; Manganese compounds; Oxygen; Platinum compounds; Ruthenium compounds; Seawater; Titanium compounds; Chloride oxidation reaction; Chlorine reduction; Faradaic efficiencies; Hydrogen evolution reactions; Hydrogen production reactions; Membraneless; Oxidation reactions; Reduction reaction; Seawater electrolysis; Selectivity; Electrocatalysts English 2023 2023-05-05 10.1016/j.apcatb.2022.122275 바로가기 바로가기 바로가기 바로가기
Article Microstructural characteristics and low-cycle fatigue properties of AZ91 and AZ91-Ca-Y alloys extruded at different temperatures The commercial AZ91 alloy and nonflammable SEN9 (AZ91-0.3Ca-0.2Y, wt%) alloy are extruded at 300 degrees C and 400 degrees C. Their microstructure, tensile and compressive properties, and low-cycle fatigue (LCF) properties are investigated, with particular focus on the influence of the extrusion temperature. In the AZ91 and SEN9 materials extruded at 300 degrees C (300-materials), numerous fine Mg 17 Al 12 particles are inhomogeneously distributed owing to localized dynamic precipitation during extrusion, unlike those extruded at 400 degrees C (400-materials). These fine particles suppress the coarsening of recrystallized grains, decreasing the average grain size of 300-materials. Although the four extruded materials have considerably different microstructures, the difference in their tensile yield strengths is insignificant because strong grain-boundary hardening and precipitation hardening effects in 300-materials are offset almost completely by a strong texture hardening effect in 400-materials. However, owing to their finer grains and weaker texture, 300-materials have higher compressive yield strengths than 400-materials. During the LCF tests, {10-12} twinning is activated at lower stresses in 400-materials than in 300-materials. Because the fatigue damage accumulated per cycle is smaller in 400-materials, they have longer fatigue lives than those of 300-materials. A fatigue life prediction model for the investigated materials is established on the basis of the relationship between the total strain energy density ( 6.W t ) and the number of cycles to fatigue failure ( N f ), and it is expressed through a simple equation ( 6.W t = 10 center dot N f -0.59 ). This model enables fatigue life prediction of both the investigated alloys regardless of the extrusion temperature and strain amplitude. (c) 2022 Chongqing University. Publishing services provided by Elsevier B.V. on behalf of KeAi Communications Co. Ltd. This is an open access article under the CC BY-NC-ND license ( http://creativecommons.org/licenses/by-nc-nd/4.0/ ) Peer review under responsibility of Chongqing University Kim, Ye Jin; Kim, Young Min; Bae, Jun Ho; Joo, Soo-Hyun; Park, Sung Hyuk Kyungpook Natl Univ, Sch Mat Sci & Engn, Daegu 41566, South Korea; Korea Inst Mat Sci, Adv Met Div, Chang Won 51508, South Korea; Dankook Univ, Dept Mat Sci & Engn, Cheonan 31116, South Korea Park, Sung-Hyuk/AAE-6726-2022; joo, soohyun/E-8292-2013; Kim, Young Min/HCH-5414-2022 59052467200; 58795669000; 36900467300; 35738843100; 54786002500 sh.park@knu.ac.kr; JOURNAL OF MAGNESIUM AND ALLOYS J MAGNES ALLOY 2213-9567 11 3 SCIE METALLURGY & METALLURGICAL ENGINEERING 2023 15.8 0.6 1.78 2025-06-25 17 14 AZ91-Ca-Y; Extrusion temperature; Microstructure; Low -cycle fatigue; Fatigue life prediction model MECHANICAL-PROPERTIES; MAGNESIUM ALLOY; EXTRUSION TEMPERATURE; CRACK INITIATION; YIELD ASYMMETRY; BEHAVIOR; DEFORMATION; CA; RECRYSTALLIZATION; EVOLUTION AZ91–Ca–Y; Extrusion temperature; Fatigue life prediction model; Low-cycle fatigue; Microstructure Extrusion; Fatigue; Grain; Hardening; Life; Materials; Particles; Temperature; Age hardening; Aluminum alloys; Binary alloys; Coarsening; Extrusion; Forecasting; Grain boundaries; Magnesium alloys; Precipitation (chemical); Strain energy; Tensile strength; Textures; Yield stress; AZ91 alloy; Az91–ca–Y; Extrusion temperatures; Fatigue life prediction models; Hardening effects; Low cycle fatigues; Low-cycle fatigue properties; Microstructural characteristics; Microstructures properties; Non-flammable; Low-cycle fatigue English 2023 2023-03 10.1016/j.jma.2021.12.015 바로가기 바로가기 바로가기 바로가기
Article Microstructural evolution of pre-twinned Mg alloy with annealing temperature and underlying boundary migration mechanism This study investigates the variations in the microstructural characteristics of a pre-twinned Mg alloy with the temperature of the subsequent annealing treatment. To this end, a rolled AZ31 alloy is compressed to 3% plastic strain along the rolling direction (RD) to activate {10-12} twinning and is subsequently annealed at 200, 250, 300, 350, and 400 degrees C. Numerous {10-12} twins are formed throughout the compressed material, leading to the formation of a RD-oriented texture. At an annealing temperature of 200 degrees C, no microstructural variations occur during annealing. As the annealing temperature increases from 250 to 400 degrees C, the residual strain energy and remaining twin boundaries of the annealed material decrease owing to the promoted static recovery and the increased area fraction of twin-free grown grains. Consequently, an increase in the annealing temperature results in a gradual microstructural transition from a fully twinned grain structure to a completely twin-free grain structure. The microstructural evolution during annealing is predominantly governed by the movement of high-angle grain boundaries via a strain-induced boundary migration mechanism, and a few twin boundaries migrate above 350 degrees C because of their lower boundary energy. The boundary migration behavior and resultant microstructural evolution are discussed in detail based on the variations in boundary mobility and driving force for boundary migration with annealing temperature. (c) 2022 Chongqing University. Publishing services provided by Elsevier B.V. on behalf of KeAi Communications Co. Ltd. This is an open access article under the CC BY-NC-ND license ( http://creativecommons.org/licenses/by-nc-nd/4.0/ ) Peer review under responsibility of Chongqing University Kim, Ye Jin; Lee, Jong Un; Lee, Gyo Myeong; Park, Sung Hyuk Kyungpook Natl Univ, Sch Mat Sci & Engn, Daegu 41566, South Korea Park, Sung-Hyuk/AAE-6726-2022 59052467200; 57195056728; 57222810183; 54786002500 sh.park@knu.ac.kr; JOURNAL OF MAGNESIUM AND ALLOYS J MAGNES ALLOY 2213-9567 11 8 SCIE METALLURGY & METALLURGICAL ENGINEERING 2023 15.8 0.6 2.55 2025-06-25 23 20 Rolled Mg alloy; {10-12} twin; Grain growth; Boundary migration; Annealing. ROLLED MG-3AL-1ZN ALLOY; MAGNESIUM-ALLOY; GRAIN-BOUNDARIES; FORMABILITY; DEFORMATION; IMPROVEMENT; BEHAVIOR; TENSION; ENERGY; PRECOMPRESSION Annealing; Boundary migration; Grain growth; Rolled Mg alloy; {10-12} twin Annealing; Grain boundaries; Grain size and shape; Magnesium alloys; Microstructural evolution; Rolling; Strain energy; Textures; Annealing; Annealing temperatures; Boundary migration; Mg alloy; Migration mechanisms; Rolled mg alloy; Rolling direction; Twin boundaries; Twin-free; {10-12} twin; Grain growth English 2023 2023-08 10.1016/j.jma.2022.10.023 바로가기 바로가기 바로가기 바로가기
Review Multifunctional carbon nitride nanoarchitectures for catalysis Catalysis is at the heart of modern-day chemical and pharmaceutical industries, and there is an urgent demand to develop metal-free, high surface area, and efficient catalysts in a scalable, reproducible and economic manner. Amongst the ever-expanding two-dimensional materials family, carbon nitride (CN) has emerged as the most researched material for catalytic applications due to its unique molecular structure with tunable visible range band gap, surface defects, basic sites, and nitrogen functionalities. These properties also endow it with anchoring capability with a large number of catalytically active sites and provide opportunities for doping, hybridization, sensitization, etc. To make considerable progress in the use of CN as a highly effective catalyst for various applications, it is critical to have an in-depth understanding of its synthesis, structure and surface sites. The present review provides an overview of the recent advances in synthetic approaches of CN, its physicochemical properties, and band gap engineering, with a focus on its exclusive usage in a variety of catalytic reactions, including hydrogen evolution reactions, overall water splitting, water oxidation, CO2 reduction, nitrogen reduction reactions, pollutant degradation, and organocatalysis. While the structural design and band gap engineering of catalysts are elaborated, the surface chemistry is dealt with in detail to demonstrate efficient catalytic performances. Burning challenges in catalytic design and future outlook are elucidated. Carbon nitrides, with feasibility of tailored band gap via suitable nanoarchitectonics, are deemed as best catalysts amongst existing materials, especially for HER, OWS, COR, NRR, water oxidation, pollutant removal, and organocatalysis. Kumar, Prashant; Singh, Gurwinder; Guan, Xinwei; Lee, Jangmee; Bahadur, Rohan; Ramadass, Kavitha; Kumar, Pawan; Kibria, Md. Golam; Vidyasagar, Devthade; Yi, Jiabao; Vinu, Ajayan Univ Newcastle, Global Innovat Ctr Adv Nanomat, Coll Engn Sci & Environm CESE, Univ Dr, Callaghan, NSW 2308, Australia; Univ Calgary, Dept Chem & Petr Engn, 2500 Univ Dr NW, Calgary, AB T2N 1N4, Canada; Kyungpook Natl Univ, Sch Mat Sci & Engn, Daegu 41566, South Korea KUMAR, PRASHANT/AAZ-9714-2020; Bahadur, Rohan/AAA-1526-2022; Vidyasagar, Devthade/O-3930-2015; Singh, Gurwinder/S-9647-2019; Vinu, Ajayan/ADE-9111-2022; Kibria, Md. Golam/HDM-0704-2022; Kumar, Pawan/L-1750-2016; Yi, Jiabao/A-1867-2011; Guan, Xinwei/AEK-7027-2022; Ramadass, Kavitha/M-6623-2015 57281641400; 57208193925; 57194215957; 54975257400; 57203767812; 20436756800; 57192194417; 57211039036; 57201674442; 8568145300; 6603916006 Prashant.Kumar@newcastle.edu.au;Ajayan.Vinu@newcastle.edu.au; CHEMICAL SOCIETY REVIEWS CHEM SOC REV 0306-0012 1460-4744 52 21 SCIE CHEMISTRY, MULTIDISCIPLINARY 2023 40.4 0.6 3.62 2025-06-25 106 106 PHOTOCATALYTIC H-2 EVOLUTION; SINGLE-ATOM CATALYSTS; BINUCLEAR RUTHENIUM(II) COMPLEX; PULSED-LASER DEPOSITION; HIGH-NITROGEN CONTENT; ONE-POT SYNTHESIS; VISIBLE-LIGHT; HYDROGEN EVOLUTION; CO2 REDUCTION; SURFACE-AREA Carbon nitride; Catalysis; Catalytic oxidation; Degradation; Energy gap; Nitrogen; Physicochemical properties; Structural design; Surface chemistry; Surface defects; Water pollution; Band gap engineering; Catalytic applications; Efficient catalysts; High surface area; Metal free; Nano-architecture; Pharmaceutical industry; Tunables; Two-dimensional materials; ]+ catalyst; Catalyst activity English 2023 2023-10-30 10.1039/d3cs00213f 바로가기 바로가기 바로가기 바로가기
Review OBSTRUCTIVE NEPHROPATHY ANDMOLECULAR PATHOPHYSIOLOGY OF RENAL INTERSTITIAL FIBROSIS The kidneys play a key role in maintaining total body homeostasis. The complexity of this task is reflected in the unique architecture of the organ. Ureteral obstruction greatly affects renal physiology by altering hemodynamics, changing glomerular filtration and renal metabolism, and inducing architectural malformations of the kidney parenchyma, most importantly renal fibrosis. Persisting pathological changes lead to chronic kidney disease, which currently affects similar to 10% of the global population and is one of the major causes of death worldwide. Studies on the consequences of ureteral obstruction date back to the 1800s. Even today, experimental unilateral ureteral obstruction (UUO) remains the standard model for tubulointerstitial fibrosis. However, the model has certain limitations when it comes to studying tubular injury and repair, as well as a limited potential for human translation. Nevertheless, ureteral obstruction has provided the scientific community with a wealth of knowledge on renal (patho)physiology. With the introduction of advanced omics techniques, the classical UUO model has remained relevant to this day and has been instrumental in understanding renal fibrosis at the molecular, genomic, and cellular levels. This review details key concepts and recent advances in the understanding of obstructive nephropathy, highlighting the pathophysiological hallmarks responsible for the functional and architectural changes induced by ureteral obstruction, with a special emphasis on renal fibrosis. Norregaard, Rikke; Mutsaers, Henricus A. M.; Frokiaer, Jorgen; Kwon, Tae-Hwan Aarhus Univ, Dept Clin Med, Aarhus, Denmark; Aarhus Univ Hosp, Dept Renal Med, Aarhus, Denmark; Kyungpook Natl Univ, Sch Med, Dept Biochem & Cell Biol, Taegu, South Korea Frokiaer, Jorgen/KHV-5925-2024; Kwon, Tae-Hwan/ABA-1981-2020; Mutsaers, Henricus/AAK-6321-2020 8642489000; 26531570500; 7007036298; 7202206089 RN@clin.au.dk;JF@clin.au.dk; PHYSIOLOGICAL REVIEWS PHYSIOL REV 0031-9333 1522-1210 103 4 SCIE PHYSIOLOGY 2023 33.4 0.6 4.01 2025-06-25 63 65 chronic kidney disease; fibrosis; hemodynamics; homeostasis; ureteral obstruction UNILATERAL URETERAL OBSTRUCTION; TISSUE GROWTH-FACTOR; RENIN-ANGIOTENSIN SYSTEM; NONSTEROIDAL ANTIINFLAMMATORY DRUGS; EPITHELIAL-MESENCHYMAL TRANSITION; URINARY-TRACT OBSTRUCTION; INTEGRIN-LINKED KINASE; A RECEPTOR ANTAGONISM; MARROW-DERIVED CELLS; FACTOR-KAPPA-B chronic kidney disease; fibrosis; hemodynamics; homeostasis; ureteral obstruction Animals; Disease Models, Animal; Fibrosis; Hemodynamics; Humans; Kidney; Renal Insufficiency, Chronic; Ureteral Obstruction; chronic kidney failure; disease duration; disease severity; end stage renal disease; glomerulus filtration; hemodynamics; human; interstitial nephritis; kidney fibrosis; kidney function; kidney malformation; kidney metabolism; kidney parenchyma; nephritis; nonhuman; obstructive uropathy; Review; signal transduction; ureter obstruction; animal; chronic kidney failure; complication; disease model; fibrosis; kidney; metabolism; pathology; ureter obstruction English 2023 2023-10-01 10.1152/physrev.00027.2022 바로가기 바로가기 바로가기 바로가기
Review Recent research progress on magnesium alloys in Korea: A review This review highlights the recent advancements in Mg research in South Korea with a prime focus on high-speed-extrudable Mg-Bibased alloys for high productivity and strength, innovative techniques utilizing {10-12} twinning for improved mechanical properties, and alloying and processing methods for enhanced corrosion resistance. High-alloyed Mg-Bi-based alloys possess thermally stable alpha-Mg matrix and secondary phase, which ensures high-speed extrusion of these alloys at elevated temperatures without hot cracking. Consequently, they exhibit outstanding extrudability with a maximum extrusion speed of up to 70 m/min. Furthermore, their high alloying contents offer excellent strength even after high-speed extrusion through strong solid solution hardening and particle hardening effects, making them suitable for high-performance extruded Mg products. The pre-twinning process utilizing {10-12} twinning and the combined process of pre-twinning and subsequent annealing have shown promise in controlling microstructure and texture of wrought Mg alloys and thus enhancing their mechanical properties. The pre-twinning process enhances tensile strength, fatigue properties, and age-hardening rate of Mg alloys. Furthermore, the combined processes of pre-twinning and subsequent annealing considerably improve their ductility, stretch formability, bending formability, and damping capacity. Efforts have been made to improve the corrosion resistance of Mg alloys through alloying additions, process treatments, and surface coatings. Alloying elements like Ca, Sc, and Sm alter the microstructural features (such as secondary phases and grain size) that affect the corrosion phenomenon. Process treatments such as multidirectional forging, screw rolling, and pulse electron beam can also improve the corrosion resistance by refining the microstructure. Furthermore, advanced surface coating technologies can create durable and corrosion-resistant layers for effectively protecting the Mg alloys. All these research activities conducted in South Korea have considerably contributed to the widespread utilization of Mg alloys in diverse applications by overcoming the inherent limitations of Mg alloys such as low extrudability, formability, and corrosion resistance.(c) 2023 Chongqing University. Publishing services provided by Elsevier B.V. on behalf of KeAi Communications Co. Ltd. This is an open access article under the CC BY-NC-ND license ( http://creativecommons.org/licenses/by-nc-nd/4.0/ ) Peer review under responsibility of Chongqing University Park, Sung Hyuk; Kim, Ye Jin; Kim, Hyun Ji; Jin, Sang-Cheol; Lee, Jong Un; Komissarov, Alexander; Shin, Kwang Seon Kyungpook Natl Univ, Sch Mat Sci & Engn, Daegu 41566, South Korea; Natl Univ Sci & Technol, Lab Hybrid Nanostruct Mat, Moscow 119049, Russia; Moscow State Univ Med & Dent, Lab Med Bioresorpt & Bioresistance, Moscow 127473, Russia; Seoul Natl Univ, Sch Mat Sci & Engn, Magnesium Technol Innovat Ctr, Seoul 08826, South Korea Shin, Kwang Seon/AAE-6177-2021; Park, Sung-Hyuk/AAE-6726-2022; Komissarov, Alexander/G-6717-2014; Kim, Hyunjin/MDS-5282-2025 54786002500; 59052467200; 59866513600; 57198914140; 57195056728; 56553875000; 26430446200 sh.park@knu.ac.kr;ksshin@snu.ac.kr; JOURNAL OF MAGNESIUM AND ALLOYS J MAGNES ALLOY 2213-9567 11 10 SCIE METALLURGY & METALLURGICAL ENGINEERING 2023 15.8 0.6 0.84 2025-06-25 21 22 South Korea; Mg-Bi alloys; {10-12} twinning; Corrosion; Mechanical properties SEVERE PLASTIC-DEFORMATION; AL-ZN ALLOY; MECHANICAL-PROPERTIES; CORROSION-RESISTANCE; MG ALLOY; GRAIN-REFINEMENT; CRYSTALLOGRAPHIC ORIENTATION; MICROSTRUCTURAL EVOLUTION; TENSILE PROPERTIES; IMPROVING TENSILE Corrosion; Mechanical properties; Mg–Bi alloys; South Korea; {10–12} twinning Age hardening; Alloying; Alloying elements; Bismuth alloys; Corrosion resistant alloys; Corrosion resistant coatings; Extrusion; High strength alloys; Magnesium alloys; Tensile strength; Textures; Bi-based; Extrudability; High Speed; Mg alloy; Mg–bi alloy; Process treatments; Secondary phase; South Korea; Surface coatings; {10–12} twinning; Corrosion resistance English 2023 2023-10 10.1016/j.jma.2023.08.007 바로가기 바로가기 바로가기 바로가기
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