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Korean J. Met. Mater.
2024;62(7):564-592. Published online 2024 Jun 28
DOI:
https://doi.org/10.3365/KJMM.2024.62.7.564
Abstract
The stacking fault energy (SFE) of face-centered cubic (FCC) alloys is a critical parameter that controls microstructural and crystallographic texture evolution during deformation and annealing treatments. This review focuses on several FCC alloys, aluminum (Al), copper (Cu), austenitic stainless steels (ASSs), and high entropy alloys (HEAs), all of which exhibit.....
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탄점소성 다결정 모델을 활용한 삼축성 예측 및 검증
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박진화, 정영웅
Korean J. Met. Mater.
2022;60(8):607-618. Published online 2022 Jul 19
DOI:
https://doi.org/10.3365/KJMM.2022.60.8.607
Abstract
The ΔEVPSC numerical code based on the elasto-visco-plastic HEM (Homogeneous Effective Medium) provides a multiscale constitutive modeling framework that is suitable for describing a wide range of mechanical behaviors of polycrystalline metals. In this study, an AA6061-T6 aluminum sample was chosen to validate the predictive capability of the ΔEVPSC stand-alone.....
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Web of Science 1
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Korean J. Met. Mater.
2021;59(1):61-66. Published online 2021 Jan 5
DOI:
https://doi.org/10.3365/KJMM.2021.59.1.61
Abstract
The Charpy impact test is used to identify the transition between ductility and brittleness. The percentages of ductile and brittle fractures in steel can be evaluated based on each fracture area, which is presently determined by an analyzer with the naked eye. This method may lead to subjective judgement, and.....
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Web of Science 4
Crossref 5
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Zr-1.5Nb-0.4Sn-0.2Fe-0.1Cr 지르코늄 합금 압연 판재의 동적 변형시효 거동
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김일현, 이명호, 정양일, 김현길, 장재일
Korean J. Met. Mater.
2021;59(1):8-13. Published online 2021 Jan 5
DOI:
https://doi.org/10.3365/KJMM.2021.59.1.8
Abstract
The behavior of dynamic strain aging (DSA) in a Zr-1.5Nb-0.4Sn-0.2Fe-0.1Cr alloy strip was investigated at temperature ranges of 25–600 °C via a tensile test. The tensile test was performed at two different strain rates 8.33 × 10
-5
and 1.67 × 10
-2
s
-1
. The shear stress of the alloy strip revealed.....
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Web of Science 2
Crossref 2
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Al-Mg-Si 합금의 초기 석출물이 비대칭 압연에 의한 전단변형에 미치는 영향 : 집합조직과 성형성
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채원기, 김봉규, 이종범, 한준현
Korean J. Met. Mater.
2020;58(10):703-714. Published online 2020 Oct 5
DOI:
https://doi.org/10.3365/KJMM.2020.58.10.703
Abstract
Al-Mg-Si alloy was rolled asymmetrically at several temperatures to apply shear deformation, and the effects of the initial precipitate on shear deformation, texture evolution, formability, and plastic anisotropy were studied. Texture was analyzed using a EBSD, and the formability and plastic anisotropy of the specimen were evaluated using the value.....
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Web of Science 9
Crossref 9
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Zr-2.5%Nb 압력관 재료에서
α
-Zr 영역에서의 소둔에 의한
β
-상 분해가 재결정에 미치는 영향
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김성수, 임상엽, 이경근
Korean J. Met. Mater.
2020;58(10):672-679. Published online 2020 Oct 5
DOI:
https://doi.org/10.3365/KJMM.2020.58.10.672
Abstract
The effects of β phase decomposition on recrystallization and texture variation in Zr-2.5% Nb alloy pressure tube material were investigated. Isothermal annealing was conducted at 350 to 550
o
C for 240 hours, and isothermal annealing was performed at 500
o
C for 240 to 3,000 hours. The recrystallization and texture variation.....
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Web of Science 1
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비기저면 집합조직을 가지는 마그네슘 합금의 고속압연 온도 변화에 따른 압연재 미세조직 변화
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이수진, 김예진, 이정훈, 박성혁
Korean J. Met. Mater.
2019;57(8):482-490. Published online 2019 Jul 4
DOI:
https://doi.org/10.3365/KJMM.2019.57.8.482
Abstract
In this study, the effects of rolling temperature on the microstructural characteristics of a highspeed-rolled Mg alloy with a non-basal texture were investigated. To this end, commercial AZ31 alloy samples in which the basal poles of most grains were tilted at an angle of 45° from the normal direction (ND).....
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Web of Science 2
Crossref 3
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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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고순도 구리 선재의 어닐링 후 불균질 미세조직과 집합조직에 미치는 신선 시 전단 변형의 영향
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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
Abstract
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.....
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Crossref 4
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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 6
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흑연 및 Mo 기판 위에 CVD 성장된 Re 코팅층의 미세조직
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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
Abstract
Rhenium coatings were fabricated on a graphite substrate at 1100 and 1250
o
C and a molybdenum substrate at 1150 and 1250
o
C 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.....
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Fe-3.2 wt% Si 방향성 전기강판에서 냉간압연 횟수가 집합조직과 {110}<001> Goss 결정립 형성에 미치는 영향
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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
Abstract
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.....
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Mg-RE계 고온용 합금의 특성과 최근 연구 동향
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남수우
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
Abstract
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.....
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