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COMSOL을 활용한 신 마그네슘 전해 공정 수치해석 모델 개발
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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.....
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Crossref 2
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MgO 나노선의 성장과 음극선 발광 특성에 미치는 산소 농도의 영향
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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 N
2
/O
2
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 1000
o
C and under a pressure of 500Torr. No nanowires were.....
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대기압의 공기 분위기에서 열증발법에 의해 합성된 가지상 구조의 MgO 나노선
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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.....
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대기압의 공기 분위기에서 열증발법에 의해 제작된 초박형 MgO 나노시트
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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
o
C in air. Scanning electron microscopy showed that the two-dimensional MgO nanosheets had widths of several micrometers and the thickness of less than.....
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Web of Science 2
Crossref 2
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DIC를 활용한 선압축과 후열처리 공정을 거친 AZ31 마그네슘 압연재의 인장 변형 거동 분석
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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.....
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Web of Science 1
Crossref 1
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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 Mg
5
(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.....
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흡착 성형체에 미치는 무기첨가제와 소성온도의 영향
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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,.....
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Web of Science 1
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MgF
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-CaF
2
-NaF 및 MgF
2
-LiF 용융염에서 액체금속 음극을 이용한 산화마그네슘의 신전해법 개발
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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.....
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Web of Science 3
Crossref 3
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CaO 첨가 AZ31 압출재의 개량된 미세조직이 인장, 고주기 피로 및 피로 균열 전파 특성에 미치는 영향
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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.....
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Web of Science 2
Crossref 1
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기계 학습을 활용한 마그네슘 합금의 통전 비선형 온도 예측
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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.....
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Web of Science 10
Crossref 8
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변형률 속도에 따른 AZ31 Mg 합금의 집합조직 및 전위 거동 관찰
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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.....
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Web of Science 3
Crossref 3
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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.....
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온간 압연 및 냉간 압연으로 제조한 AZ31 마그네슘 합금 판재의 집합조직 및 성형성 비교
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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.....
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Crossref 5
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AZ80과 TAZ711 마그네슘 압출재의 상온 및 고온 인장 특성과 고주기 피로 특성
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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.....
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Crossref 3
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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, MgH
2
, Mg
2
Ni, and Ni were added to Mg in order to improve the hydrogen-storage properties of Mg. A 84 wt% Mg + 10 wt% MgH
2
+ 5 wt% Mg
2
Ni + 1 wt% Ni sample (designated the Mg-based sample) was prepared by milling under a hydrogen atmosphere in.....
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Crossref 1
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Al 첨가가 Mg-7Sn-1Zn 합금 압출재의 미세조직과 인장 및 굽힘 특성에 미치는 영향
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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.....
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Crossref 7
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Al 5083 합금 용접부의 기계적 물성에 미치는 Mg의 영향
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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......
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마그네슘 합금 박육 부품 다이캐스팅 주조시 오버플로우 형상 및 주입속도가 주조 품질에 미치는 영향
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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.....
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마그네슘 합금의 플라스마전해산화 코팅에 영향을 미치는 제반 요소들에 대한 고찰
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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...
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Crossref 7
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Journal Impact Factor 1.2