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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 |
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| ○ | ○ | Article | Crystal growth and Ce³⁺ concentration optimization in Tl2LaCl5: An excellent scintillator for the radiation detection | High effective atomic number (70) and density (5.17 g/cm(3)) among the known halide scintillators with excellent scintillation performance make Tl2LaCl5 (TLC) a new potential candidate for X- and gamma-ray detection. The preliminary scintillation performance of TLC was reported earlier for small crystal pieces without any detail information of synthesis, crystal growth optimization conditions and Ce3+ doping concentration, which are investigated in this study. The newly developed melt rotation technique was found to be the best one for the synthesis of TLC and probably for other Tl-based compounds among the known melting techniques. Pure and nominal Ce3+ concentration of 1%, 3%, 5%, 7% and 10% TLC crystals were grown with two zones vertical Bridgman technique in two different type of homemade furnaces and found the optimum thermal gradient, pulling and cooling rate as 25 degrees C/cm, 0.5 mm/h and 20 degrees C/h, respectively. The best energy resolution of similar to 3.3% (FWHM) and light yield of similar to 82,000 ph/MeV were obtained for TLC:3%Ce3+ under 662 keV gamma-rays excitation. The promising scintillation performance of TLC revealed that this crystal could be used in Positron Emission Tomography (PET), environmental radiation monitoring and homeland security applications. (C) 2020 Published by Elsevier B.V. | Khan, Arshad; Phan Quoc Vuong; Rooh, Gul; Kim, H. J.; Kim, Sunghwan | Kyungpook Natl Univ, Dept Phys, Daegu 41566, South Korea; Abdul Wali Khan Univ, Dept Phys, Mardan 23200, Pakistan; Cheongju Univ, Dept Radiol Sci, Cheongju 41566, South Korea | ; Kim, Hong Joo/AAE-1178-2022; Rooh, Gul/AAF-2076-2019; Khan, Arshad/ABB-1566-2021 | 56017063700; 57207618553; 24401665700; 59051568100; 36165569900 | hongjoo@knu.ac.kr; | JOURNAL OF ALLOYS AND COMPOUNDS | J ALLOY COMPD | 0925-8388 | 1873-4669 | 827 | SCIE | CHEMISTRY, PHYSICAL;MATERIALS SCIENCE, MULTIDISCIPLINARY;METALLURGY & METALLURGICAL ENGINEERING | 2020 | 5.316 | 6.9 | 2.04 | 2025-06-25 | 29 | 35 | TLC; Melt-rotation technique; Luminescence Light yield; Energy resolution | X-RAY; EFFICIENT SCINTILLATOR; HALIDE SCINTILLATOR; LUMINESCENCE; PERFORMANCE | Energy resolution; Light yield; Luminescence; Melt-rotation technique; TLC | Atoms; Chlorine compounds; Crystal growth; Crystallization; Doping (additives); Lanthanum compounds; Light; Luminescence; Nuclear reactors; Positron emission tomography; Scintillation; Scintillation counters; Thallium compounds; Effective atomic number; Energy resolutions; Environmental radiation; Homeland security applications; Light yield; Positron emission tomography (PET); Scintillation performance; Vertical Bridgman technique; Gamma rays | English | 2020 | 2020-06-25 | 10.1016/j.jallcom.2020.154366 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Czochralski growth, electronic structure, luminescence and scintillation properties of Cs2Mo3O10: A new scintillation crystal for 0νββ decay search | A new molybdenum (Mo) based Cesium tri-molybdate (Cs2Mo3O10) single crystal scintillator has been grown successfully by the Czochralski technique. The crystal growth conditions such as pulling, rotation and cooling rate were optimized for crack free high-quality single crystals. The electronic band structure has been calculated with density functional theory using projector augmented wave potentials as implemented in the Vienna ab initio Simulation Package. The major contribution in the formation of valence band near the fermi level is observed from Mo and O p orbitals while the bottom of the conduction band mainly consists from Mo-d and O-p states. The grown crystal possesses good transparency above the fundamental absorption edge in the wavelength range of 400-900 nm. Optical band gap of 3 eV is estimated from the absorption spectra measured at room temperature. Luminescence and scintillation properties were measured in the temperature range of 10-300 K under the excitation of UV light at 4.42 eV, X-rays and beta rays. The emission spectrum measured at 230 K is comprising of a single band peaking at 645 nm, which intensity is enhanced with the cooling of crystal. A single exponential photoluminescent decay time of 43 mu s is obtained at 220 K which further slows down upon cooling of the crystal and found to be 1.64 ms at 10 K. The scintillation light yield of Cs2Mo3O10 crystal at 10 K is found to be 185% of Li2MoO4 (LMO) crystal. The thermally stimulated luminescence (TSL) kinetic parameters such as trap depth and frequency factor from the glow curve measured after X-ray irradiation at 10 K, have been determined using general order kinetics. A possibility of crystal growth with large volume, good optical, luminescence and scintillation properties reveal that this scintillation material can be a good candidate for the neutrinoless double beta (0 nu beta beta) decay search of Mo-100. (C) 2019 Published by Elsevier B.V. | Khan, Arshad; Daniel, D. Joseph; Tyagi, Mohit; Kim, H. J.; Lee, Moo Hyun; Kim, Yeoungduk | Kyungpook Natl Univ, Dept Phys, Daegu 41566, South Korea; Bhabha Atom Res Ctr, Tech Phys Div, Mumbai 400085, Maharashtra, India; Inst for Basic Sci Korea, Ctr Underground Phys, Daejeon 34126, South Korea | ; Khan, Arshad/ABB-1566-2021; Kim, Hong Joo/AAE-1178-2022; Lee, Moo/AAK-4266-2020; Tyagi, Mohit/T-2735-2019 | 56017063700; 35319662800; 21234397100; 59051568100; 57198252980; 7410207253 | hongjoo@knu.ac.kr; | JOURNAL OF ALLOYS AND COMPOUNDS | J ALLOY COMPD | 0925-8388 | 1873-4669 | 821 | SCIE | CHEMISTRY, PHYSICAL;MATERIALS SCIENCE, MULTIDISCIPLINARY;METALLURGY & METALLURGICAL ENGINEERING | 2020 | 5.316 | 6.9 | 1.22 | 2025-06-25 | 18 | 21 | Cs2Mo3O10; Czochralski technique; Electronic band structure; Luminescence; Scintillation | CAMOO4; 1ST | Cs<sub>2</sub>Mo<sub>3</sub>O<sub>10</sub>; Czochralski technique; Electronic band structure; Luminescence; Scintillation | Cesium compounds; Cooling; Crystal growth; Density functional theory; Electronic structure; Emission spectroscopy; Energy gap; Light; Lithium compounds; Luminescence; Scintillation; Single crystals; X rays; Cs2Mo3O10; Czochralski technique; Electronic band structure; Fundamental absorption edge; High quality single crystals; Projector augmented waves; Thermally stimulated luminescence; Vienna ab-initio simulation packages; Crystal structure | English | 2020 | 2020-04-25 | 10.1016/j.jallcom.2019.153466 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Effect of potential and current on electrodeposited MnO2 as a pseudocapacitor electrode: Surface morphology/chemistry and stability | Han, Sehun; Park, Sungjun; Yi, Seong-Hoon; Im, Won Bin; Chun, Sang-Eun | LG Chem R&D Campus Daejeon, 188 Munji Ro, Daejeon 34122, South Korea; Kyungpook Natl Univ, Sch Mat Sci & Engn, Daegu 41566, South Korea; Hanyang Univ, Div Mat Sci & Engn, 222 Wangsimni Ro, Seoul 04763, South Korea | Bin IM, Won/B-1335-2011; Yi, Seonghoon/HGC-6912-2022 | 57210959438; 57195715519; 14008383000; 8091604200; 36801080300 | tpgns1112@lgchem.com;yish@knu.ac.kr;imwonbin@hanyang.ac.kr;sangeun@knu.ac.kr; | JOURNAL OF ALLOYS AND COMPOUNDS | J ALLOY COMPD | 0925-8388 | 1873-4669 | 831 | SCIE | CHEMISTRY, PHYSICAL;MATERIALS SCIENCE, MULTIDISCIPLINARY;METALLURGY & METALLURGICAL ENGINEERING | 2020 | 5.316 | 6.9 | 0.81 | 2025-06-25 | 13 | 17 | MANGANESE OXIDE; CHARGE-STORAGE; ENERGY-STORAGE; ELECTROCHEMICAL PERFORMANCE; COMPOSITE ELECTRODES; SUPERCAPACITOR; DIOXIDE; NANOWIRES; MECHANISM; GROWTH | Electrochemical stability; Electrodeposition; Irreversible reaction; Manganese oxide film; Pseudocapacitor; Surface morphology/chemistry | Capacitance; Electrodeposition; Electrodes; Manganese oxide; Oxide films; Stability; Supercapacitor; Surface morphology; Applied potentials; Electrochemical stabilities; Electrodeposition conditions; Galvanostatic mode; Irreversible reactions; Long term stability; Nucleation and growth; Specific capacitance; Morphology | English | 2020 | 2020-08-05 | 10.1016/j.jallcom.2020.154838 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||||
| ○ | ○ | Article | Effect of working pressure on the properties of RF sputtered SnS thin films and photovoltaic performance of SnS-based solar cells | Tin sulfide (SnS) thin films were deposited with a single SnS target by radio frequency magnetron sputtering while varying the working pressure (0.6 Pa to 2.6 Pa), and the structural, chemical, electrical and optical properties of the SnS thin films were investigated. X-ray diffraction results showed that all the SnS thin films had a (111) plane preferred growth orientation, and X-ray photoelectron spectroscopy verified that a SnS thin film was grown with an orthorhombic crystal structure that had, a binding energy of 324.5 eV. Owing to the long wavelength shift in the transmittance spectrum, the optical band gap decreased from 1.56 eV to 1.47 eV. The SnS-based conventionally structured solar cell (Al/ITO/i-ZnO/CdS/SnS/Mo/SLG), which was prepared with a SnS absorption layer and deposited at a working pressure of 2.0 Pa, achieved the highest power conversion efficiency of 0.58%. This result shows its high efficiency compared to those with a conventional structure in other reports. (C) 2020 Elsevier B.V. All rights reserved. | Son, Seung-Ik; Shin, Donghyeok; Son, Young Guk; Son, Chang Sik; Kim, Dong Ryeol; Park, Joo Hyung; Kim, Seohan; Hwang, Donghyun; Song, Pungkeun | Pusan Natl Univ, Dept Mat Sci & Engn, Busan 46241, South Korea; Silla Univ, Div Mat Sci & Engn, Busan 46958, South Korea; Korea Inst Energy Res, Photovolta Lab, Daejeon 34129, South Korea; Pusan Natl Univ, Mat Technol Res Inst, Busan 46241, South Korea; Kyungpook Natl Univ, Sch Mat Sci & Engn, Daegu 41566, South Korea | Park, Joo Hyung/AAL-5247-2020; , Pung Keun Song/ABF-2687-2021 | 57215719994; 57898354700; 54407591800; 35829658500; 57194069208; 57193059568; 57189497932; 57203231010; 55800733100 | copymoc@gmail.com;shindh122@naver.com;ykson@pusan.ac.kr;csson@silla.ac.kr;DRkim@kier.re.kr;joopark@kier.re.kr;seohahnkim@gmail.co;dhhwang@silla.ac.kr;pksong@pusan.ac.kr; | JOURNAL OF ALLOYS AND COMPOUNDS | J ALLOY COMPD | 0925-8388 | 1873-4669 | 831 | SCIE | CHEMISTRY, PHYSICAL;MATERIALS SCIENCE, MULTIDISCIPLINARY;METALLURGY & METALLURGICAL ENGINEERING | 2020 | 5.316 | 6.9 | 2.04 | 2025-06-25 | 45 | 44 | Tin sulfide; Thin films; SnS based Solar cells; Radio frequency magnetron sputtering; Single target; Working pressure | OPTICAL-PROPERTIES; LAYER; TEMPERATURE | Radio frequency magnetron sputtering; Single target; SnS based Solar cells; Thin films; Tin sulfide; Working pressure | Aluminum compounds; Binding energy; Cadmium compounds; Crystal orientation; Energy gap; IV-VI semiconductors; Layered semiconductors; Magnetron sputtering; Optical properties; Photovoltaic effects; Protactinium; Radio waves; Solar cells; Solar power generation; Sulfur compounds; Thin films; X ray photoelectron spectroscopy; Zinc compounds; Conventional structures; Electrical and optical properties; Orthorhombic crystal structures; Photovoltaic performance; Power conversion efficiencies; Radio frequency magnetron sputtering; Tin sulfide; Working pressures; Tin compounds | English | 2020 | 2020-08-05 | 10.1016/j.jallcom.2020.154626 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Effects of Ca addition on the microstructures and mechanical properties of as-extruded Mg-Bi alloys | The microstructure and mechanical properties of as-extruded Mg-1.3Bi-xCa (x = 0, 0.4, 0.9, and 1.3 wt %) were investigated. All samples exhibit full dynamic recrystallization; the mean grain size first increases slightly and then decreases significantly. Additionally, both Mg2Bi2Ca and Mg2Ca phases are formed with increasing Ca content. In particular, the dynamic precipitation of nanoscale Mg2Ca is enhanced remarkably. The typical fiber basal texture in Ca-free binary alloy transformed into a rare-earth texture with the components of [(1) over bar2 (1) over barl] and [01 (1) over barl]//extrusion direction in Ca-bearing ternary alloys. In addition, the tensile elongation increases significantly with a trace amount of Ca addition (0.4 wt%), but an overdose of Ca addition (1.3 wt%) results in the formation of a large number of microscale Mg2Bi2Ca phases. The Mg-1.3Bi-0.9Ca alloy demonstrates the optimal balance of ductility and strength with an excellent elongation of 40% and yield strength of 158 MPa, owing to texture modification and grain refinement. This study may provide insights into the development of high-ductility, low-cost Mg-Bi-based alloys using microstructure tuning and texture modification. (C) 2020 Elsevier B.V. All rights reserved. | Meng, Shuaiju; Yu, Hui; Li, Lichao; Qin, Jianan; Woo, Sang Kyu; Go, Yohan; Kim, Young Min; Park, Sung Hyuk; Zhao, Weimin; Yin, Fuxing; You, Bong Sun; Shin, Kwang Seon | Hebei Univ Technol, Sch Mat Sci & Engn, Room C431, Tianjin 300130, Peoples R China; Korea Inst Mat Sci, Magnesium Dept, Chang Won 51508, South Korea; Helmholtz Zentrum Geesthacht, Inst Mat Res, Magnesium Innovat Ctr, Max Planck Str 1, D-21502 Geesthacht, Germany; Kyungpook Natl Univ, Sch Mat Sci & Engn, Daegu, Daegu 41566, South Korea; Seoul Natl Univ, Magnesium Technol Innovat Ctr, Seoul 08826, South Korea | Park, Sung-Hyuk/AAE-6726-2022; Kim, Young Min/HCH-5414-2022; Yin, Fuxing/AAE-4626-2020; Zhao, Weimin/I-6153-2016; Yu, Hui/H-8481-2012; Qin, Jianan/LZF-6403-2025; Shin, Kwang Seon/AAE-6177-2021; yu, hui/H-8481-2012 | 57190763504; 7405855938; 57216434423; 57216433290; 56150369300; 57200091778; 58795669000; 54786002500; 55725938100; 7202679517; 55664007600; 26430446200 | huiyu@vip.126.com;wmzhao@hebut.edu.cn; | JOURNAL OF ALLOYS AND COMPOUNDS | J ALLOY COMPD | 0925-8388 | 1873-4669 | 834 | SCIE | CHEMISTRY, PHYSICAL;MATERIALS SCIENCE, MULTIDISCIPLINARY;METALLURGY & METALLURGICAL ENGINEERING | 2020 | 5.316 | 6.9 | 2.2 | 2025-06-25 | 47 | 48 | Mg; Microstructure; Mechanical properties; Ductility | RARE-EARTH TEXTURE; HIGH-STRENGTH; DYNAMIC RECRYSTALLIZATION; MAGNESIUM; DUCTILITY; EXTRUSION; CORROSION; SPEED; CALCIUM; ORIGIN | Ductility; Mechanical properties; Mg; Microstructure | Binary alloys; Calcium alloys; Ductility; Dynamic recrystallization; Dynamics; Grain refinement; Grain size and shape; Magnesium alloys; Rare earths; Ternary alloys; Textures; Basal textures; Dynamic precipitation; Mean-grain size; Microstructure and mechanical properties; Microstructures and mechanical properties; Optimal balance; Tensile elongation; Texture modification; Bismuth alloys | English | 2020 | 2020-09-05 | 10.1016/j.jallcom.2020.155216 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Expanded graphite/copper oxide composite electrodes for cell kinetic balancing of lithium-ion capacitor | Lithium-ion batteries (LIBs), favored for their high energy density, have slow charging issues due to redox reactions in both electrodes. To overcome these issues, we present a hybrid energy storage system that delivers high energy density without sacrificing power density. This hybrid system is made up of an expanded graphite/copper oxide composite as the anode material and a porous carbon as the positive electrode material. The proposed composite anode is fabricated in one step; it shows a high specific capacity and a high specific power density due to a lowered lithium -ion insertion barrier of expanded graphite derived from copper oxide synthesis and pre-lithiation. The high theoretical capacity of copper oxide is effective in yielding high energy density. Furthermore, the reaction kinetic balancing needed for a lithium-ion capacitor is determined by the mass ratio of its electrodes. As a result, it is confirmed that internal resistance is more important than specific capacity for a lithium-ion capacitor, unlike a Li-ion battery. The optimized hybrid cell shows a high specific energy density of 212.3 Wh kg(-1) at a specific power density of 1.3 kW kg(-1) and maintains 85% of its initial energy density after 500 cycles. (C) 2020 Elsevier B.V. All rights reserved. | Lee, Seong-Hun; Yoo, Gayeong; Cho, Jinil; Ryu, Seokgyu; Kim, Youn Sang; Yoo, Jeeyoung | Seoul Natl Univ, Grad Sch Convergence Sci & Technol, Program Nano Sci & Technol, 1 Gwanak Ro, Seoul 08826, South Korea; Adv Inst Convergence Technol, 864-1 Iui Dong, Suwon 16229, Gyeonggi Do, South Korea; Kyungpook Natl Univ, Sch Energy Engn, Daegu 41566, South Korea | Kim, SoW/ABB-7917-2021; Yoo, Jeeyoung/AAH-1359-2019; Cho, Hyuk/AAU-7753-2020 | 56900122100; 57204103698; 57209801309; 57192435552; 8938854200; 56046607500 | jyoo@knu.ac.kr; | JOURNAL OF ALLOYS AND COMPOUNDS | J ALLOY COMPD | 0925-8388 | 1873-4669 | 829 | SCIE | CHEMISTRY, PHYSICAL;MATERIALS SCIENCE, MULTIDISCIPLINARY;METALLURGY & METALLURGICAL ENGINEERING | 2020 | 5.316 | 6.9 | 0.9 | 2025-06-25 | 18 | 17 | Lithium-ion capacitor; Expanded graphite; Electrode balancing; Pre-lithiation; Copper oxide anode | HIGH-ENERGY; ELECTROCHEMICAL PERFORMANCE; ANODE MATERIALS; GRAPHENE OXIDE; DENSITY; CARBON; INK | Copper oxide anode; Electrode balancing; Expanded graphite; Lithium-ion capacitor; Pre-lithiation | Anodes; Copper oxides; Graphite; Graphite electrodes; Hybrid systems; Ions; Porous carbon; Porous materials; Reaction kinetics; Redox reactions; Supercapacitor; Expanded graphite; High specific capacity; Hybrid energy storage systems; Lithium ion insertion; Lithium-ion capacitors; Positive electrode materials; Pre-lithiation; Specific energy density; Lithium-ion batteries | English | 2020 | 2020-07-15 | 10.1016/j.jallcom.2020.154566 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Growth evolution of self-catalytic tin-doped indium oxide nanowires | Self-catalytic tin-doped indium oxide nanowires were prepared via thermal-chemical vapor deposition. The growth evolution of these nanowires with respect to the growth time was investigated. Furthermore, the effect of oxygen gas flow on the growth was determined by comparing nanowires grown with/without the flow. In the early growth stages, the nanowires crawled to the substrate after droplet formation. Based on the Ellingham diagram and the difference between the energy barriers, Sn remained in the liquid phase on the head of the nanowires, whereas In2O3 formed as the stem of the wires. After 30 s of growth, the head of the crawling nanowires separated from the substrate, regardless of the droplet size. The droplets were almost completely eliminated from the end of the ITO nanowires grown under the oxygen gas flow but were present at the tips of the wires grown without the flow. The ITO nanowires grown under the flow were characterized by a turn-on field and field enhancement factor of similar to 3.4 V/mu m and 1632, respectively. The present work provides the mechanism for the growth of nanowires and the design architecture of materials used in various applications. (C) 2020 Elsevier B.V. All rights reserved. | Jung, Jinjoo; Kim, Do-Hyung | Kyungpook Natl Univ, Dept Phys, Nanoappl Phys Lab, Daegu 702701, South Korea | 55750032400; 57007491900 | kimdh@knu.ac.kr; | JOURNAL OF ALLOYS AND COMPOUNDS | J ALLOY COMPD | 0925-8388 | 1873-4669 | 823 | SCIE | CHEMISTRY, PHYSICAL;MATERIALS SCIENCE, MULTIDISCIPLINARY;METALLURGY & METALLURGICAL ENGINEERING | 2020 | 5.316 | 6.9 | 0.33 | 2025-06-25 | 4 | 4 | Tin-doped indium oxide; Nanowires; Carbothermal reduction; Vapor-solid-liquid; Field emission | SNO2; TRANSITION | Carbothermal reduction; Field emission; Nanowires; Tin-doped indium oxide; Vapor-solid-liquid | Carbothermal reduction; Chemical vapor deposition; Drops; Field emission; Flow of gases; Indium compounds; Oxygen; Tin oxides; Design architecture; Droplet formation; Effect of oxygen; Ellingham diagram; Field enhancement factor; Thermal chemical vapor deposition; Tin doped indium oxide; Vapor-solid; Nanowires | English | 2020 | 2020-05-15 | 10.1016/j.jallcom.2020.153648 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |||
| ○ | ○ | Article | Improvement in damping capacity of extruded pure magnesium through precompression and subsequent annealing: Effects of dislocation and twin boundary motions | This study demonstrates that a combined precompression and subsequent annealing (PCA) treatment considerably improves the damping capacity of extruded pure Mg. Variations in the microstructure and damping capacity with the annealing temperature of PCA are investigated. Precompression along the extrusion direction induces an increase in the dislocation density and the formation of numerous {10 -12} twins, the latter of which results in significant lattice reorientation and an increased total boundary length. Subsequent annealing at 200 degrees C causes barely any change in the formed twin structure, whereas annealing above 250 degrees C induces extensive grain growth through strain-induced grain boundary migration; this consequently reduces the twin fraction and dislocation density and increases the grain size. The samples subjected to PCA show higher damping capacities than the initial sample in both low- and high-strain-amplitude regions. The improved damping capacity in the low-strain-amplitude region is due primarily to the increase in the dislocation density and Schmid factor for basal slip; namely, more abundant dislocations move more readily, which leads to dissipation of a larger amount of energy via the vibration and sweeping motion of dislocations. In the high-strain-amplitude region, a large sweeping motion of dislocations within grown grains and additional sweeping motion of twin boundaries within twinned grains significantly improve the damping capacity. However, PCA treatment with annealing at 200 degrees C causes a relatively smaller increment in the damping capacity in the high-strain-amplitude region because the excessive dislocations and twin boundaries in this sample hinder their motions. (C) 2020 Elsevier B.V. All rights reserved. | Kim, Sang-Hoon; Park, Sung Hyuk | Kyungpook Natl Univ, Sch Mat Sci & Engn, Daegu 702701, South Korea | Kim, Sang-Hoon/AAA-2248-2020; Park, Sung-Hyuk/AAE-6726-2022 | 57206878833; 54786002500 | sh.park@knu.ac.kr; | JOURNAL OF ALLOYS AND COMPOUNDS | J ALLOY COMPD | 0925-8388 | 1873-4669 | 835 | SCIE | CHEMISTRY, PHYSICAL;MATERIALS SCIENCE, MULTIDISCIPLINARY;METALLURGY & METALLURGICAL ENGINEERING | 2020 | 5.316 | 6.9 | 1.63 | 2025-06-25 | 32 | 34 | Magnesium; Damping capacity; Microstructure; Twinning; Annealing | DEFORMATION-BEHAVIOR; INTERNAL-FRICTION; HEAT-TREATMENT; MG; ALLOY; ZN; BIOMATERIALS; PLASTICITY; DUCTILITY; STRAIN | Annealing; Damping capacity; Magnesium; Microstructure; Twinning | Annealing; Grain boundaries; Grain growth; Magnesium; Annealing temperatures; Damping capacity; Dislocation densities; Extruded pure magnesium; Pre-compression; Strain induced grain boundary migration; Twin boundaries; Twin boundary motion; Damping | English | 2020 | 2020-09-15 | 10.1016/j.jallcom.2020.155257 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Lattice distortion and anisotropic thermoelectric properties in hot-deformed CuI-doped Bi2Te2.7Se0.3 | We investigated anisotropic thermoelectric properties of (CuI)(x)Bi2Te2.7Se0.3 (x = 0.0, 0.3, 0.6, and 0.9 mol.%) compounds, synthesized by the hot-press and hot-deformation process. In spite of poly-crystalline compound, the hot-deformed compounds exhibit preferred orientation along the c-axis, parallel with the applied press direction. The sample of x= 0.3 mol.% shows the maximum power factor (3.8 mW m(-1) K-2 at 300 K) and ZT value (0.97 at 423 K), which is relatively high thermoelectric performance in n-type thermoelectric materials as a mild-temperature operation. Notably, the in-plane lattice thermal conductivity of the x = 0.3% compound with covalent bonding layer has lower value than the one of out-of-plane lattice thermal conductivity with van der Waals bonding layer. From the high resolution transmission electron microscopy and electron diffraction measurements, we observe the lattice distortion of the x = 0.3% compound. Therefore, the unconventional anisotropic lattice thermal conductivity can be associated with the lattice distortion along the in-plane on the compound driven by the CuI doping. (C) 2019 Elsevier B.V. All rights reserved. | Kim, Jin Hee; Cho, Hyunyong; Back, Song Yi; Yun, Jae Hyun; Lee, Ho Seong; Rhyee, Jong-Soo | Kyung Hee Univ, Dept Appl Phys, Yongin 17104, Gyeong Gi, South Korea; Kyung Hee Univ, Inst Nat Sci, Yongin 17104, Gyeong Gi, South Korea; Kyungpook Natl Univ, Sch Mat Sci & Engn, Daegu 41566, South Korea | ; Rhyee, Jong-Soo/AAK-7173-2020; Back, Song Yi/ABP-6733-2022 | 57194613785; 57196076542; 57196079077; 57189224964; 55706810400; 6603282348 | jsrhyee@khu.ac.kr; | JOURNAL OF ALLOYS AND COMPOUNDS | J ALLOY COMPD | 0925-8388 | 1873-4669 | 815 | SCIE | CHEMISTRY, PHYSICAL;MATERIALS SCIENCE, MULTIDISCIPLINARY;METALLURGY & METALLURGICAL ENGINEERING | 2020 | 5.316 | 6.9 | 1.3 | 2025-06-25 | 29 | 28 | Thermoelectric; High ZT; Lattice distortion; Hot deformation | BISMUTH-TELLURIDE; RECENT PROGRESS; PERFORMANCE | High ZT; Hot deformation; Lattice distortion; Thermoelectric | Anisotropy; Copper compounds; Crystal lattices; Deformation; High resolution transmission electron microscopy; Hot working; Presses (machine tools); Thermal conductivity; Thermoelectric equipment; Thermoelectricity; Van der Waals forces; Diffraction measurements; High zt; Lattice distortions; Polycrystalline compounds; Thermo-Electric materials; Thermoelectric; Thermoelectric performance; Thermoelectric properties; Iodine compounds | English | 2020 | 2020-01-30 | 10.1016/j.jallcom.2019.152649 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Loss of HSPA9 induces peroxisomal degradation by increasing pexophagy | Quality control of peroxisomes is essential for cellular homeostasis. However, the mechanism underlying pexophagy is largely unknown. In this study, we identified HSPA9 as a novel pexophagy regulator. Downregulation of HSPA9 increased macroautophagy/autophagy but decreased the number of peroxisomes in vitro and in vivo. The loss of peroxisomes by HSPA9 depletion was attenuated in SQSTM1-deficient cells. In HSPA9-deficient cells, the level of peroxisomal reactive oxygen species (ROS) increased, while inhibition of ROS blocked pexophagy in HeLa and SH-SY5Y cells. Importantly, reconstitution of HSPA9 mutants found in Parkinson disease failed to rescue the loss of peroxisomes, whereas reconstitution with wild type inhibited pexophagy in HSPA9-depleted cells. Knockdown of Hsc70-5 decreased peroxisomes in Drosophila, and the HSPA9 mutants failed to rescue the loss of peroxisomes in Hsc70-5-depleted flies. Taken together, our findings suggest that the loss of HSPA9 enhances peroxisomal degradation by pexophagy. | Jo, Doo Sin; Park, So Jung; Kim, Ae-Kyeong; Park, Na Yeon; Kim, Joon Bum; Bae, Ji-Eun; Park, Hyun Jun; Shin, Ji Hyun; Chang, Jong Wook; Kim, Peter K.; Jung, Yong-Keun; Koh, Jae-Young; Choe, Seong-Kyu; Lee, Kyu-Sun; Cho, Dong-Hyung | Kyungpook Natl Univ, Sch Life Sci, Daegu, South Korea; Univ Cambridge, Cambridge Inst Med Res, Dept Med Genet, Cambridge, England; Korea Res Inst Biosci & Biotechnol, Metab & Neurophysiol Res Grp, 125 Gwahakro, Daejeon 34141, South Korea; Samsung Med Ctr, Cell & Regenerat Med Inst, Seoul, South Korea; Univ Toronto, Dept Biochem, Toronto, ON, Canada; Seoul Natl Univ, Sch Biol Sci, Seoul, South Korea; Univ Ulsan, Coll Med, Asan Med Ctr, Dept Neurol, Seoul, South Korea; Wonkwang Univ, Sch Med, Dept Microbiol, Iksan 54538, Jeonbuk, South Korea | KIM, SUNG/ADF-8559-2022; Choi, Hye Rin/JDV-9065-2023; Kim, Joon/ADP-8066-2022; Lee, Kyu-Sun/NOE-7536-2025; Koh, Jae-Young/C-9014-2011; Chang, Jong Wook/HJY-3619-2023 | 56335489800; 58839092700; 24173122200; 57190609826; 57190611030; 57190605352; 57209409221; 55301099200; 9248994900; 24776060900; 35358575000; 7201756953; 7101751727; 24577234300; 35093684400 | seongkyu642@wku.ac.kr;ekuse74@kribb.re.kr;dhcho@knu.ac.kr; | AUTOPHAGY | AUTOPHAGY | 1554-8627 | 1554-8635 | 16 | 11 | SCIE | CELL BIOLOGY | 2020 | 16.016 | 6.9 | 1.82 | 2025-06-25 | 42 | 45 | Drosophila; HSPA9; Parkinson disease; peroxisome; pexophagy; ROS | PARKINSONS-DISEASE; ALPHA-SYNUCLEIN; ELEVATED LEVELS; MORTALIN; CHAPERONE; BIOGENESIS; AUTOPHAGY; LOCALIZATION; EXPRESSION; MITOPHAGY | Drosophila; HSPA9; Parkinson disease; peroxisome; pexophagy; ROS | Autophagy; HSP70 Heat-Shock Proteins; Humans; Macroautophagy; Mitochondrial Proteins; Peroxisomes; Reactive Oxygen Species; ABC transporter; ABC transporter D3; acetylcysteine; autophagy related protein; bafilomycin A1; catalase; glucose; heat shock cognate protein 70; hspa9 protein; mitochondrial protein; reactive oxygen metabolite; regulator protein; sequestosome 1; unclassified drug; heat shock protein 70; HSPA9 protein, human; mitochondrial protein; reactive oxygen metabolite; amino acid substitution; animal cell; Article; controlled study; degradation; Drosophila; embryo; female; fluorescence microscopy; gene knockdown; gene overexpression; HeLa cell line; human; human cell; immunohistochemistry; in vitro study; in vivo study; mitochondrial targeting signal; mouse; nonhuman; Parkinson disease; peroxisome; pexophagy; protein depletion; autophagy; macroautophagy; metabolism; peroxisome; physiology | English | 2020 | 2020-11-01 | 10.1080/15548627.2020.1712812 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | |
| ○ | ○ | Article | Molecular dynamics simulation and luminescence properties of Eu³⁺ doped molybdenum gadolinium borate glasses for red emission | The contribution reports on molecular dynamics simulation were used to understand, at the molecular level, the interaction of molybdenum, gadolinium and europium ions with neighboring oxygen. Molecular dynamics simulations were carried out to evaluate the bond distance between Gd-Eu and Mo -Eu and found that the Gd-Eu bond distance is larger than for Mo-Eu. Various spectroscopic characterizations were employed to comprehend their optical and structural properties for their interconnectivity. Computational analysis was employed which emphasizes the radial distribution functions and their co-ordination numbers around Gd, Mo and Eu atoms. Phonon Side Band (PSB) spectrum associated with F-7(0) -> D-5(2) transition of Eu3+ ions confirms the phonon energy of the prepared glass which was reconfirmed with FTIR and Raman spectra. The oscillator strength with and without thermal corrections was calculated from absorption spectrum to evaluate Judd-Ofelt (JO) analysis and JO parameters were estimated for 0.5 mol% Eu2O3 doped 25MoO(3)-20Gd(2)O(3)-(55-x)B2O3 glasses. Radiative properties such as transition probabilities, stimulated emission cross-sections and branching ratios were estimated by using JO parameters and luminescence spectra. The decay time and CIE coordinates have been calculated for prepared glass samples. (C) 2019 Elsevier B.V. All rights reserved. | Rajaramakrishna, R.; Nijapai, P.; Kidkhunthod, P.; Kim, H. J.; Kaewkhao, J.; Ruangtaweep, Y. | Nakhon Pathom Rajabhat Univ, Ctr Excellence Glass Technol & Mat Sci CEGM, Meuang 73000, Nakhon Pathom, Thailand; Suranaree Univ Technol, Sch Phys, Inst Sci, Muang 30000, Nakhon Ratchasi, Thailand; Synhcrotron Light Res Inst Publ Org, 111 Univ Ave, Muang 30000, Nakhon Ratchasi, Thailand; Kyungpook Natl Univ, Dept Phys, Deagu 702701, South Korea | ; Kim, Hong Joo/AAE-1178-2022; R, Rajaramakrishna/E-8110-2019 | 49864195200; 57210994127; 35272197100; 59051568100; 23974520300; 37108588700 | mink110@hotmail.com;yotsakitt@hotmail.com; | JOURNAL OF ALLOYS AND COMPOUNDS | J ALLOY COMPD | 0925-8388 | 1873-4669 | 813 | SCIE | CHEMISTRY, PHYSICAL;MATERIALS SCIENCE, MULTIDISCIPLINARY;METALLURGY & METALLURGICAL ENGINEERING | 2020 | 5.316 | 6.9 | 5.62 | 2025-06-25 | 77 | 84 | Eu(3)(+)ions; Borate glasses; Judd-ofelt analysis; Luminescence; Thermal correction; Molecular dynamics | SIDE-BAND ANALYSIS; ENERGY-TRANSFER; PHOSPHATE-GLASSES; LITHIUM-BORATE; SPECTROSCOPIC PROPERTIES; FLUOROPHOSPHATE GLASSES; EU3+-DOPED PHOSPHATE; OPTICAL-ABSORPTION; BEHAVIOR; RAMAN | Borate glasses; Eu<sup>3+</sup>ions; Judd-ofelt analysis; Luminescence; Molecular dynamics; Thermal correction | Absorption spectroscopy; Distribution functions; Fourier transform infrared spectroscopy; Glass; Glass transition; Ions; Luminescence; Molecular dynamics; Molecular oxygen; Molybdenum compounds; Parameter estimation; Phonons; Borate glass; Judd-ofelt analysis; Molecular dynamics simulations; Radial distribution functions; Spectroscopic characterization; Stimulated emission cross section; Thermal correction; Transition probabilities; Gadolinium compounds | English | 2020 | 2020-01-15 | 10.1016/j.jallcom.2019.151914 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Novel Mg-Bi-Al alloy with extraordinary extrudability and high strength | A novel high-alloyed Mg-5Bi-3Al (BA53, wt%) alloy with extraordinary extrudability and high strength is developed. It is successfully extruded at a die-exit speed of 67 m/min without any hot cracking, which is over 10 times the maximum extrusion speeds of commercial high-alloyed Mg alloys, e.g., AZ80 and ZK60. The BA53 alloy extruded at 67 m/min shows high tensile yield strengths in the as-extruded and peak-aged states (188 and 214 MPa, respectively). These excellent extrudability and high strength are mainly attributed to the formation of thermally stable Mg3Bi2 phase. Undissolved coarse and fine Mg3Bi2 particles effectively suppress grain growth during and after extrusion through grain-boundary pinning, leading to the formation of a relatively fine grain structure. Fine rod-type Mg3Bi2 precipitates formed on the prismatic plane along the (mg) direction during air-cooling after existing the die lead to precipitation hardening. The formation of numerous nanosized Mg3Bi2 precipitates along the 10 > mg direction during subsequent aging improves the material strength without ductility loss. The developed BA53 alloy, which comprises inexpensive alloying elements Bi and Al, can be extensively used for manufacturing extruded Mg products because of its high cost-competitiveness, processing efficiency, and mechanical properties. | Go, Jongbin; Jin, Sang-Cheol; Kim, Hyunji; Yu, Hui; Park, Sung Hyuk | Kyungpook Natl Univ, Sch Mat Sci & Engn, Daegu 41566, South Korea; Hebei Univ Technol, Sch Mat Sci & Engn, Tianjin 300130, Peoples R China | yu, hui/H-8481-2012; Park, Sung-Hyuk/AAE-6726-2022; Yu, Hui/H-8481-2012 | 57204606110; 57198914140; 57208408040; 7405855938; 54786002500 | sh.park@knu.ac.kr; | JOURNAL OF ALLOYS AND COMPOUNDS | J ALLOY COMPD | 0925-8388 | 1873-4669 | 843 | SCIE | CHEMISTRY, PHYSICAL;MATERIALS SCIENCE, MULTIDISCIPLINARY;METALLURGY & METALLURGICAL ENGINEERING | 2020 | 5.316 | 6.9 | 3.01 | 2025-06-25 | 61 | 63 | Mg-Bi-Al alloy; High-speed extrusion; Mechanical properties; Age-hardenability | MECHANICAL-PROPERTIES; EXTRUSION CONDITIONS; MICROSTRUCTURE; TEXTURE; PRECIPITATION; RECRYSTALLIZATION | Age-hardenability; High-speed extrusion; Mechanical properties; Mg–Bi–Al alloy | Age hardening; Alloying elements; Aluminum alloys; Binary alloys; Bismuth alloys; Extrusion; Grain boundaries; Grain growth; High strength alloys; Tensile strength; Ductility loss; Extrudability; Extrusion speed; Fine grain structure; Material strength; Prismatic planes; Tensile yield strength; Thermally stable; Magnesium alloys | English | 2020 | 2020-11-30 | 10.1016/j.jallcom.2020.156026 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | PTK2/FAK regulates UPS impairment via SQSTM1/p62 phosphorylation in TARDBP/TDP-43 proteinopathies | TARDBP/TDP-43 (TAR DNA binding protein) proteinopathies are a common feature in a variety of neurodegenerative disorders, including amyotrophic lateral sclerosis (ALS), frontotemporal lobar degeneration (FTLD), and Alzheimer disease (AD). However, the molecular mechanisms underlying TARDBP-induced neurotoxicity are largely unknown. In this study, we demonstrated that TARDBP proteinopathies induce impairment in the ubiquitin proteasome system (UPS), as evidenced by an accumulation of ubiquitinated proteins and a reduction in proteasome activity in neuronal cells. Through kinase inhibitor screening, we identified PTK2/FAK (PTK2 protein tyrosine kinase 2) as a suppressor of neurotoxicity induced by UPS impairment. Importantly, PTK2 inhibition significantly reduced ubiquitin aggregates and attenuated TARDBP-induced cytotoxicity in a Drosophila model of TARDBP proteinopathies. We further identified that phosphorylation of SQSTM1/p62 (sequestosome 1) at S403 (p-SQSTM1 [S403]), a key component in the autophagic degradation of poly-ubiquitinated proteins, is increased upon TARDBP overexpression and is dependent on the activation of PTK2 in neuronal cells. Moreover, expressing a non-phosphorylated form of SQSTM1 (SQSTM1(S403A)) significantly repressed the accumulation of insoluble poly-ubiquitinated proteins and neurotoxicity induced by TARDBP overexpression in neuronal cells. In addition, TBK1 (TANK binding kinase 1), a kinase that phosphorylates S403 of SQSTM1, was found to be involved in the PTK2-mediated phosphorylation of SQSTM1. Taken together, our data suggest that the PTK2-TBK1-SQSTM1 axis plays a critical role in the pathogenesis of TARDBP by regulating neurotoxicity induced by UPS impairment. Therefore, targeting the PTK2-TBK1-SQSTM1 axis may represent a novel therapeutic intervention for neurodegenerative diseases with TARDBP proteinopathies. | Lee, Shinrye; Jeon, Yu-Mi; Cha, Sun Joo; Kim, Seyeon; Kwon, Younghwi; Jo, Myungjin; Jang, You-Na; Lee, Seongsoo; Kim, Jaekwang; Kim, Sang Ryong; Lee, Kea Joo; Lee, Sung Bae; Kim, Kiyoung; Kim, Hyung-Jun | KBRI, Dementia Res Grp, Daegu, South Korea; Soonchunhyang Univ, Soonchunhyang Inst Medi Bio Sci, Cheonan, South Korea; DGIST, Dept Brain & Cognit Sci, Daegu, South Korea; KBRI, Neural Circuits Res Grp, Daegu, South Korea; KBSI, Gwangju Ctr, Gwangju, South Korea; Kyungpook Natl Univ, Inst Life Sci & Biotechnol, Plus KNU Creat BioRes Grp BK21, Sch Life Sci, Daegu, South Korea; Kyungpook Natl Univ, Brain Sci & Engn Inst, Daegu, South Korea; Soonchunhyang Univ, Dept Med Biotechnol, Asan, South Korea | 17342428400; 36158214700; 56659035500; 57194160625; 57194168806; 57189727853; 57201447693; 57192516634; 57201935123; 56486163800; 8579761400; 57192503364; 57202307555; 57191717907 | kiyoung2@sch.ac.kr;kijang1@kbri.re.kr; | AUTOPHAGY | AUTOPHAGY | 1554-8627 | 1554-8635 | 16 | 8 | SCIE | CELL BIOLOGY | 2020 | 16.016 | 6.9 | 1.5 | 2025-06-25 | 39 | 36 | Amyotrophic lateral sclerosis; PTK2; FAK; SQSTM1; p62; TARDBP; TDP-43; ubiquitin-proteasome system | AMYOTROPHIC-LATERAL-SCLEROSIS; FOCAL ADHESION KINASE; UBIQUITIN-PROTEASOME SYSTEM; FRONTOTEMPORAL LOBAR DEGENERATION; SELECTIVE AUTOPHAGY; CELL-DEATH; TDP-43; MUTATIONS; DISEASE; PATHOGENESIS | Amyotrophic lateral sclerosis; PTK2/FAK; SQSTM1/p62; TARDBP/TDP-43; ubiquitin-proteasome system | Animals; Autophagy; Behavior, Animal; DNA-Binding Proteins; Down-Regulation; Drosophila melanogaster; Focal Adhesion Kinase 1; Mice; Models, Biological; Mutation; Neurotoxins; Phosphorylation; Phosphoserine; Protein-Serine-Threonine Kinases; Sequestosome-1 Protein; Solubility; TDP-43 Proteinopathies; Ubiquitinated Proteins; Unfolded Protein Response; cyclin dependent kinase 5; focal adhesion kinase 1; phosphotransferase; phosphotransferase inhibitor; proteasome; sequestosome 1; tank binding kinase 1; ubiquitin; ubiquitinated protein; unclassified drug; DNA binding protein; focal adhesion kinase 1; neurotoxin; phosphoserine; protein serine threonine kinase; sequestosome 1; Tbk1 protein, mouse; TDP-43 protein, mouse; ubiquitinated protein; adult; animal cell; animal experiment; animal model; Article; controlled study; cytotoxicity; enzyme activation; enzyme activity; fruit fly model; male; nerve cell; neuropathology; neurotoxicity; nonhuman; protein phosphorylation; TDP 43 proteinopathy; animal; animal behavior; autophagy; biological model; down regulation; Drosophila melanogaster; drug effect; genetics; metabolism; mouse; mutation; phosphorylation; solubility; TDP 43 proteinopathy; unfolded protein response | English | 2020 | 2020-08-02 | 10.1080/15548627.2019.1686729 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Significant improvement in the mechanical properties of an extruded Mg-5Bi alloy through the addition of Al | This study demonstrates that the addition of Al to an Mg-5Bi alloy effectively promotes dynamic recrystallization during hot extrusion and significantly improves the mechanical properties of the extruded alloy. When the Al content increases from 0 wt% to 9 wt%, the area fraction of recrystallized grains increases from 69.3% to 100%, which can be attributed to the greater number of recrystallization nucleation sites due to grain refinement of the billet, enhanced particle-stimulated nucleation due to the greater abundance of undissolved particles, and the facilitation of dislocation accumulation due to the lower stacking fault energy. The addition of Al also simultaneously improves the microstructural homogeneity, tensile and compressive strength, ductility, and yield symmetry of the extruded alloys. The tensile yield strength x elongation value of the extruded material dramatically increases from 412 to 3489 MPa.% with the addition of 6 wt% Al to the Mg-5Bi alloy. The variation in dynamic recrystallization and dynamic precipitation behaviors with changes in Al content and the association between the microstructural characteristics and mechanical properties of the extruded alloys are discussed in detail. (C) 2019 Elsevier B.V. All rights reserved. | Go, Jongbin; Lee, Jeong Hun; Yu, Hui; Park, Sung Hyuk | Kyungpook Natl Univ, Sch Mat Sci & Engn, Daegu 41566, South Korea; Korea Inst Ind Technol, Ulsan Reg Div, Ulsan 44413, South Korea; Hebei Univ Technol, Sch Mat Sci & Engn, Tianjin 300130, Peoples R China | ; Yu, Hui/H-8481-2012; Park, Sung-Hyuk/AAE-6726-2022; yu, hui/H-8481-2012; Lee, Jeong Hun/KFS-8195-2024 | 57204606110; 54785958500; 7405855938; 54786002500 | sh.park@knu.ac.kr; | JOURNAL OF ALLOYS AND COMPOUNDS | J ALLOY COMPD | 0925-8388 | 1873-4669 | 821 | SCIE | CHEMISTRY, PHYSICAL;MATERIALS SCIENCE, MULTIDISCIPLINARY;METALLURGY & METALLURGICAL ENGINEERING | 2020 | 5.316 | 6.9 | 1.71 | 2025-06-25 | 33 | 34 | Mg-Bi alloy; Al addition; Extrusion; Recrystallization; Mechanical properties | HOMOGENIZATION TEMPERATURE; DYNAMIC RECRYSTALLIZATION; FRACTURE-BEHAVIOR; MAGNESIUM; MICROSTRUCTURE; DEFORMATION; SEGREGATION; ENERGIES | Al addition; Extrusion; Mechanical properties; Mg-Bi alloy; Recrystallization | Aluminum; Binary alloys; Bismuth alloys; Compressive strength; Crystallization; Dynamic recrystallization; Dynamics; Extrusion; Grain refinement; Mechanical properties; Nucleation; Precipitation (chemical); Tensile strength; Al additions; Dislocation accumulation; Micro-structural characteristics; Microstructural homogeneity; Particle stimulated nucleation; Recrystallization nucleation; Stacking fault energies; Tensile yield strength; Magnesium alloys | English | 2020 | 2020-04-25 | 10.1016/j.jallcom.2019.153442 | 바로가기 | 바로가기 | 바로가기 | 바로가기 | ||
| ○ | ○ | Article | Static recrystallization mechanism in cold-rolled magnesium alloy with off-basal texture based on quasi in situ EBSD observations | In this study, the deformation behavior of a Mg alloy with an off-basal texture during cold rolling and the static recrystallization in the cold-rolled sheet during subsequent annealing were investigated. To this end, an AZ31 sample having a texture with basal poles oriented along the transverse direction (TD) was rolled to a 20% reduction at room temperature, and the developed microstructure and its variation during annealing were analyzed by quasi in situ electron backscatter diffraction measurements. In the cold-rolled sample, numerous shear bands were formed throughout the material. In addition, several types of twins and intersections, such as (10-12) tension twins, (10-12)-(10-12) double twins, twin-twin intersections, and twin-grain boundary (GB) intersections, appeared in the non-shear-band region. After annealing for different durations, recrystallization occurred in both the shear-band and nonshear-band regions of the cold-rolled sample, but the recrystallization rates and grain growth behaviors remarkably differed between the two regions. At the early stages of annealing, recrystallization rapidly occurs in the shear bands with a large amount of internal strain energy. However, the formed grains are constrained within the shear bands during annealing. In the non-shear-band region, the recrystallization rate was slower than that in the shear-band region, but the recrystallized grains continued to form and grow during annealing, which strongly affected the final recrystallized microstructure. We conclude that the static recrystallization in grains with off-basal orientations and the resulting textural changes can provide new insight into developing Mg alloy sheets with high formability. (C) 2020 Elsevier B.V. All rights reserved. | Lee, Sang Won; Park, Sung Hyuk | Korea Adv Inst Sci & Technol KAIST, Dept Mat Sci & Engn, Daejeon 34141, South Korea; Kyungpook Natl Univ, Sch Mat Sci & Engn, Daegu 41566, South Korea | Park, Sung-Hyuk/AAE-6726-2022; Lee, Sangwon/AAJ-7850-2020 | 57201375104; 54786002500 | sh.park@knu.ac.kr; | JOURNAL OF ALLOYS AND COMPOUNDS | J ALLOY COMPD | 0925-8388 | 1873-4669 | 844 | SCIE | CHEMISTRY, PHYSICAL;MATERIALS SCIENCE, MULTIDISCIPLINARY;METALLURGY & METALLURGICAL ENGINEERING | 2020 | 5.316 | 6.9 | 1.3 | 2025-06-25 | 28 | 28 | Magnesium alloy; Cold rolling; Initial texture; Twinning; Static recrystallization | DYNAMIC RECRYSTALLIZATION; DEFORMATION MECHANISMS; ROLLING TEMPERATURE; NUCLEATION SITES; MG ALLOY; BEHAVIOR; EVOLUTION; MICROSTRUCTURE; DUCTILITY; TWINS | Cold rolling; Initial texture; Magnesium alloy; Static recrystallization; Twinning | Annealing; Cold rolling; Grain boundaries; Grain growth; Magnesium alloys; Metal cladding; Shear bands; Strain energy; Textures; Cold rolled sheet; Deformation behavior; Electron back scatter diffraction; Grain growth behavior; Recrystallized grains; Recrystallized microstructures; Static recrystallization; Twin intersection; Recrystallization (metallurgy) | English | 2020 | 2020-12-05 | 10.1016/j.jallcom.2020.156185 | 바로가기 | 바로가기 | 바로가기 | 바로가기 |
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