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Development of Numerical Analysis Model for New Magnesium Electrolysis Process Using COMSOL
COMSOL을 활용한 신 마그네슘 전해 공정 수치해석 모델 개발
MaeHyun Cho, Hyeong-Jun Jeoung, Jungshin Kang, Kunok Chang
조매현, 정형준, 강정신, 장근옥
Korean J. Met. Mater. 2023;61(8):625-631.   Published online 2023 Jul 24
DOI: https://doi.org/10.3365/KJMM.2023.61.8.625

Abstract
Magnesium (Mg) has good physical properties including light weight, excellent specific strength and high stiffness, and Mg is used in many fields. But current production methods of Mg have disadvantages, such as the generation of sulfur oxide and chlorine gas. In this situation, The Korea Institute of Geoscience and Mineral..... More

                   Crossref 2
Effect of Oxygen Concentration on the Growth and Cathodoluminescence Properties of MgO Nanowires
MgO 나노선의 성장과 음극선 발광 특성에 미치는 산소 농도의 영향
Geun-Hyoung Lee
이근형
Korean J. Met. Mater. 2023;61(7):509-513.   Published online 2023 Jun 21
DOI: https://doi.org/10.3365/KJMM.2023.61.7.509

Abstract
MgO nanowires were grown by a thermal evaporation method at different N2/O2 gas ratios in order to investigate the effect of oxygen concentration on the growth and luminescence properties of the MgO nanowires. A thermal evaporation process was conducted at 1000oC and under a pressure of 500Torr. No nanowires were..... More

                
Branched MgO Nanowires Synthesized by Thermal Evaporation Method in Air at Atmospheric Pressure
대기압의 공기 분위기에서 열증발법에 의해 합성된 가지상 구조의 MgO 나노선
Geun-Hyoung Lee
이근형
Korean J. Met. Mater. 2023;61(6):444-448.   Published online 2023 May 18
DOI: https://doi.org/10.3365/KJMM.2023.61.6.444

Abstract
MgO nanowires with a branched structure were fabricated using a thermal evaporation method in air at atmospheric pressure. The branched MgO nanowire was made up of two parts: a primary central nanowire trunk and lots of secondary nanowire branches. The branched MgO nanowires had a 4-fold symmetrical structure. The secondary..... More

                
Ultrathin MgO Nanosheets Fabricated by Thermal Evaporation Method in Air at Atmospheric Pressure
대기압의 공기 분위기에서 열증발법에 의해 제작된 초박형 MgO 나노시트
Geun-Hyoung Lee
이근형
Korean J. Met. Mater. 2022;60(10):769-773.   Published online 2022 Sep 29
DOI: https://doi.org/10.3365/KJMM.2022.60.10.769

Abstract
Ultrathin MgO nanosheets were successfully synthesized by thermal evaporation of a mixture of Mg and graphite powders as the source material. The synthesis was performed at 1000 oC in air. Scanning electron microscopy showed that the two-dimensional MgO nanosheets had widths of several micrometers and the thickness of less than..... More

                   Web of Science 2  Crossref 2
Analysis of Tensile Deformation Behavior of Rolled AZ31 Mg Alloy Subjected to Precompression and Subsequent Annealing Using DIC
DIC를 활용한 선압축과 후열처리 공정을 거친 AZ31 마그네슘 압연재의 인장 변형 거동 분석
Gyo Myeong Lee, Jung Eun Kim, Sung Hyuk Park
이교명, 김정은, 박성혁
Korean J. Met. Mater. 2022;60(9):701-712.   Published online 2022 Aug 30
DOI: https://doi.org/10.3365/KJMM.2022.60.9.701

Abstract
This study investigates the effects of precompression and subsequent annealing on the tensile deformation behavior of a rolled AZ31 Mg alloy at room temperature using digital image correlation (DIC). When the as-rolled sample (AR sample) is subjected to precompresssion along the rolling direction (RD) and transverse direction (TD), the sample’s..... More

                   Web of Science 1  Crossref 1
Enhancing mechanical properties of Mg-Gd-Y-Zn alloys via microalloying with Ce and La
Zhaobin Zhang, Jonghyun Kim, Hongxin Liao, Ki Buem Kim, Taekjib Choi, Taekyung Lee, Fusheng Pan
김기범, 최택집, 이태경,
Korean J. Met. Mater. 2022;60(9):654-667.   Published online 2022 Aug 30
DOI: https://doi.org/10.3365/KJMM.2022.60.9.654

Abstract
This study investigated the microstructure and mechanical properties of Mg-1Gd-1Y-1Zn (at.%) alloys containing designed amounts of Ce or La. The Mg5(Gd,Zn) phase formed in the as-cast Mg-Gd-Y-Zn-Ce/La alloys and disappeared after a homogenization treatment at 500°C for 24 h. The addition of Ce and La resulted in the formation of..... More

                
Effect of Inorganic Additives and Sintering Temperature on Adsorbents
흡착 성형체에 미치는 무기첨가제와 소성온도의 영향
Min A Bae, Kyeong Ho Kim, Jae Ho Baek
배민아, 김경호, 백재호
Korean J. Met. Mater. 2022;60(3):244-250.   Published online 2022 Feb 8
DOI: https://doi.org/10.3365/KJMM.2022.60.3.244

Abstract
Magnesium silicate is a porous material with a large specific surface area and is easily adsorbed. In particular, it is widely used commercially because it is very effective for adsorbing Na+, K+ ions and other catalysts. However, if the powder is used as an adsorbent as is, there are disadvantages,..... More

                   Web of Science 1  Crossref 1
Investigation of Electrowinning of Mg from MgO Using a Liquid Metal Cathode in MgF<sub>2</sub>-CaF<sub>2</sub>-NaF or MgF<sub>2</sub>-LiF Molten Salt
MgF2-CaF2-NaF 및 MgF2-LiF 용융염에서 액체금속 음극을 이용한 산화마그네슘의 신전해법 개발
Tae-Hyuk Lee, HyungKyu Park, Jin-Young Lee, Young Min Kim, Jungshin Kang
이태혁, 박형규, 이진영, 김영민, 강정신
Korean J. Met. Mater. 2021;59(6):392-403.   Published online 2021 May 26
DOI: https://doi.org/10.3365/KJMM.2021.59.6.392

Abstract
A novel magnesium (Mg) production process utilizing an electrolytic method was investigated for the direct reduction of magnesium oxide (MgO). Electrolysis of MgO was carried out with an applied voltage of 3.0 V using a copper (Cu), silver (Ag), or tin (Sn) cathode and carbon (C) or platinum (Pt) anode..... More

                   Web of Science 3  Crossref 3
Effect of Tailored Microstructures in CaO-Added AZ31 Extrusion Material on Tensile, High Cycle Fatigue and Fatigue Crack Propagation Properties
CaO 첨가 AZ31 압출재의 개량된 미세조직이 인장, 고주기 피로 및 피로 균열 전파 특성에 미치는 영향
Young-Kyun Kim, Min-Jong Kim, Yu-Jin Hwang, Shae. K. Kim, Hyun-Kyu Lim, Kee-Ahn Lee
김영균, 김민종, 황유진, 김세광, 임현규, 이기안
Korean J. Met. Mater. 2021;59(6):365-373.   Published online 2021 May 26
DOI: https://doi.org/10.3365/KJMM.2021.59.6.365

Abstract
The effect of tailored microstructures in 0.5 wt% CaO added AZ31 on tensile, high-cycle fatigue, and fatigue crack growth properties was examined. By adding CaO, the average grain size (AGS) was significantly reduced from 4.25±2.32 μm (conventional AZ31) to 2.42±1.60 μm (CaO-AZ31). The fineprecipitates of CaO-AZ31 were more evenly distributed..... More

                   Web of Science 2  Crossref 1
Prediction of Electropulse-Induced Nonlinear Temperature Variation of Mg Alloy Based on Machine Learning
기계 학습을 활용한 마그네슘 합금의 통전 비선형 온도 예측
Jinyeong Yu, Myoungjae Lee, Young Hoon Moon, Yoojeong Noh, Taekyung Lee
유진영, 이명재, 문영훈, 노유정, 이태경
Korean J. Met. Mater. 2020;58(6):413-422.   Published online 2020 May 19
DOI: https://doi.org/10.3365/KJMM.2020.58.6.413

Abstract
Electropulse-induced heating has attracted attention due to its high energy efficiency. However, the process gives rise to a nonlinear temperature variation, which is difficult to predict using a traditional physics model. As an alternative, this study employed machine-learning technology to predict such temperature variation for the first time. Mg alloy..... More

                   Web of Science 10  Crossref 8
Investigation of the Texture and Dislocation Behavior of AZ31 Magnesium Alloy Under Different Strain Rate Conditions
변형률 속도에 따른 AZ31 Mg 합금의 집합조직 및 전위 거동 관찰
Dong-Gi Lee, Jun-Beom Kwon, Hyun-Jong Lee, Su-Mi Jo, Young-Mok Rhyim, Won-Jon Yang, Yang-do Kim
이동기, 권준범, 이현종, 조수미, 임영목, 양원존, 김양도
Korean J. Met. Mater. 2019;57(5):279-288.   Published online 2019 May 5
DOI: https://doi.org/10.3365/KJMM.2019.57.5.279

Abstract
This study is concerned with the influence of strain rate on the plastic deformation behavior and microstructure variables of AZ31 magnesium alloy sheet. The tensile properties were measured at room temperature at a strain rate of 0.001 and 100 s–1 using a universal tensile testing machine and servo-hydraulic high-speed tensile..... More

                   Web of Science 3  Crossref 3
Hydrogenation Properties of MgH<sub>2</sub>CaO Composites Synthesized by Hydrogen-Induced Mechanical Alloying
Min Gyeom Kim, Jeong-Heum Han, Young-Hwan Lee, Jong-Tae Son, Tae Whan Hong
Korean J. Met. Mater. 2018;56(11):829-834.   Published online 2018 Nov 5
DOI: https://doi.org/10.3365/KJMM.2018.56.11.829

Abstract
Although magnesium-based alloys are attractive materials for hydrogen storage applications, their activation properties, hydrogenation/dehydrogenation kinetics, thermodynamic equilibrium parameters, and degradation characteristics must be improved for practical applications. Further, magnesium poses several risks, including explosion hazard, environmental pollution, insufficient formability, and industrial damage. To overcome these problems, CaO-added Mg alloys, also..... More

                
Comparative Study on the Texture Evolution and Formability of Warm-Rolled and Cold-Rolled AZ31 Magnesium Alloy Sheets
온간 압연 및 냉간 압연으로 제조한 AZ31 마그네슘 합금 판재의 집합조직 및 성형성 비교
Su Mi Jo, Bong Sun You, Young Min Kim
조수미, 유봉선, 김영민
Korean J. Met. Mater. 2018;56(10):734-744.   Published online 2018 Oct 5
DOI: https://doi.org/10.3365/KJMM.2018.56.10.734

Abstract
The microstructure, texture evolution, and room temperature formability of warm-rolled and coldrolled AZ31 magnesium sheets were investigated in this study. The localized deformation regions, i.e., shear bands, formed during warm-rolling and cold-rolling mainly provide nucleation sites for recrystallization, but the orientation of the recrystallized grains nucleated on the shear bands..... More

                   Crossref 5
Tensile Properties at Room and Elevated Temperatures and High-Cycle Fatigue Properties of Extruded AZ80 and TAZ711 Alloys
AZ80과 TAZ711 마그네슘 압출재의 상온 및 고온 인장 특성과 고주기 피로 특성
Sang Won Lee, Sang-Hoon Kim, Sung Hyuk Park
이상원, 김상훈, 박성혁
Korean J. Met. Mater. 2018;56(10):699-707.   Published online 2018 Oct 5
DOI: https://doi.org/10.3365/KJMM.2018.56.10.699

Abstract
The microstructure, tensile properties at room and elevated temperatures, and high-cycle fatigue behavior of an extruded Mg-7Sn-1Al-1Zn (TAZ711) alloy were investigated in comparison with those of an Mg-8Al-0.5Zn (AZ80) alloy extruded under the same conditions. The extruded AZ80 alloy exhibited a fully recrystallized structure, whereas the extruded TAZ711 alloy had..... More

                   Crossref 3
Hydrogen Absorption and Release Properties of MgH<sub>2</sub>, Mg<sub>2</sub>Ni, and Ni-Added Mg via Reactive Mechanical Grinding
Seong-Hyeon Hong, Myoung Youp Song
Korean J. Met. Mater. 2018;56(2):155-162.   Published online 2018 Feb 5
DOI: https://doi.org/10.3365/KJMM.2018.56.2.155

Abstract
In this work, MgH2, Mg2Ni, and Ni were added to Mg in order to improve the hydrogen-storage properties of Mg. A 84 wt% Mg + 10 wt% MgH2 + 5 wt% Mg2Ni + 1 wt% Ni sample (designated the Mg-based sample) was prepared by milling under a hydrogen atmosphere in..... More

       Crossref 1
Effect of Al Addition on the Microstructure, Tensile Properties, and Bendability of Extruded Mg-7Sn-1Zn Alloy
Al 첨가가 Mg-7Sn-1Zn 합금 압출재의 미세조직과 인장 및 굽힘 특성에 미치는 영향
Sang-Hoon Kim, Jong Un Lee, Ye Jin Kim, Jae Ok Choi, Jeong-Hun Lee, Sung Hyuk Park
김상훈, 이종언, 김예진, 최재옥, 이정훈, 박성혁
Korean J. Met. Mater. 2018;56(1):40-48.   Published online 2018 Jan 1
DOI: https://doi.org/10.3365/KJMM.2018.56.1.40

Abstract
The effect of Al addition on the microstructure and mechanical properties of extruded Mg-Sn based alloy is investigated by adding 1 wt% Al to the Mg-7Sn-1Zn alloy and indirectly extruding the billets with and without the Al addition. The Al addition promotes dynamic recrystallization (DRX) behaviour during hot extrusion, which..... More

       Crossref 7
Effect of Aluminum Welding Wire Mg Content on the Mechanical Properties of Al 5083 Alloy Weld Metal
Al 5083 합금 용접부의 기계적 물성에 미치는 Mg의 영향
Dongyoon Kim, Dongcheol Kim, Munjin Kang, Young-Min Kim
김동윤, 김동철, 강문진, 김영민
Korean J. Met. Mater. 2017;55(10):716-723.   Published online 2017 Sep 28
DOI: https://doi.org/10.3365/KJMM.2017.55.10.716

Abstract
A new aluminum welding wire with 0.8 wt% higher in Mg content was developed and compared with commercial welding wire of the 5000 series. The weldability of the Al5083 base material was evaluated using high current metal inert gas (MIG) welding, using the developed Al5183 and commercial Al5183 welding wire...... More

    
Effect of Overflow Geometry and Injection Speed on the Casting Product during the Magnesium Alloy Die-casting Process for Thin-walled Electronic Housing Components
마그네슘 합금 박육 부품 다이캐스팅 주조시 오버플로우 형상 및 주입속도가 주조 품질에 미치는 영향
Eui-Hyuk Kwon, Jaehong Kwon, Beyong-Chul Kim, Jeong-Whan Han
권의혁, 권재홍, 김병철, 한정환
Korean J. Met. Mater. 2017;55(7):515-522.   Published online 2017 Jul 4
DOI: https://doi.org/10.3365/KJMM.2017.55.7.515

Abstract
Casting defects such as gas traps and oxide particles must be removed in the die-casting process in order to obtain good cast products. Experimental research is costly and time-consuming, so computer simulations are typically performed in advance and then compared to experimental results. In this paper, a magnesium alloy die-casting..... More

    
Factors Influencing Plasma Electrolytic Oxidation(PEO) Coatings on Magnesium Alloys: A Review
마그네슘 합금의 플라스마전해산화 코팅에 영향을 미치는 제반 요소들에 대한 고찰
Gunchoo Shim
심건주
Korean J. Met. Mater. 2017;55(5):296-307.   Published online 2017 May 9
DOI: https://doi.org/10.3365/KJMM.2017.55.5.296
Abstract
Magnesium alloys, which possess excellent specific strength and castability, are highly susceptible to corrosion. Although anodizing is widely used to resolve this problem, it requires toxic electrolytes and produces relatively thin and weak surface coatings. Recently, plasma electrolytic oxidation (PEO) has emerged as an alternative to anodizing. Although it is... More
       Crossref 7
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