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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, oung-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

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

Effect of Shear Deformation During Drawing on Inhomogeneous Microstructures and Textures in High Purity Copper Wires After Annealing
고순도 구리 선재의 어닐링 후 불균질 미세조직과 집합조직에 미치는 신선 시 전단 변형의 영향
Hyun Park, Sang-Hyeok Kim, Se-Jong Kim, Hyo-Jong Lee
박현, 김상혁, 김세종, 이효종
Korean J. Met. Mater. 2018;56(12):861-869.   Published online 2018 Dec 5
DOI: https://doi.org/10.3365/KJMM.2018.56.12.861

To determine the origin of the inhomogeneous microstructure and texture observed in drawn and annealed high purity copper wires, two kinds of drawing process conditions and their influence was investigated. The regular condition, based on a symmetric die, and a condition designed intentionally to produce an inhomogeneous shear deformation using..... 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

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

Microstructure of Rhenium Coatings Deposited by CVD on Graphite and Mo Substrates
흑연 및 Mo 기판 위에 CVD 성장된 Re 코팅층의 미세조직
Sun Kyu Lee, Dong Yun Nam, Nam Ho Bae, Sung Taek Lim, Yong-Jun Oh
이선규, 남동윤, 배남호, 임성택, 오용준
Korean J. Met. Mater. 2018;56(3):197-204.   Published online 2018 Mar 6
DOI: https://doi.org/10.3365/KJMM.2018.56.3.197

Rhenium coatings were fabricated on a graphite substrate at 1100 and 1250 oC and a molybdenum substrate at 1150 and 1250 oC by chemical vapor deposition (CVD) using ReCl5 precursor, and the effects of deposition temperatures and substrates on microstructure and crystal orientation were investigated. The rhenium coating on graphite..... More

Effect of the Number of Cold Rolling Passes on the Formation of {110}<001> Goss-Oriented Grains in Fe-3.2 wt% Si Electrical Steel
Fe-3.2 wt% Si 방향성 전기강판에서 냉간압연 횟수가 집합조직과 {110}<001> Goss 결정립 형성에 미치는 영향
Soeng-Ho Jeon, No-Jin Park
전성호, 박노진
Korean J. Met. Mater. 2018;56(2):130-136.   Published online 2018 Feb 5
DOI: https://doi.org/10.3365/KJMM.2018.56.2.130

An excellent grain-oriented electrical steel is composed of grains with exact Goss orientation. In order to produce this, it is important to control the Goss-oriented grains during the cold-rolling process. In this study, textures measured by X-ray diffraction (XRD) and electron backscatter diffraction (EBSD) were analyzed for 1, 10, and..... More

High Temperature Properties and Recent Research Trend of Mg-RE Alloys
Mg-RE계 고온용 합금의 특성과 최근 연구 동향
Soo Woo Nam
Korean J. Met. Mater. 2017;55(4):213-221.   Published online 2017 Apr 6
DOI: https://doi.org/10.3365/KJMM.2017.55.4.213

For the applications in automotive, aircraft, aerospace, and electronic industries, the lightest structural Mg alloys have received much attention since 2000. There has been some progress for the improvement of the mechanical properties such as room temperature strength, formability and mechanical anisotropy. However, the high temperature strength of Mg alloys..... More

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