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Korean Journal of Metals and Materials
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고온 변형 곡선을 이용한 동적 재결정 해석과 동적 상변태의 조기 예측
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박노근
Korean J. Met. Mater.
2018;56(11):779-786. Published online 2018 Nov 5
DOI:
https://doi.org/10.3365/KJMM.2018.56.11.779
Abstract
There have been previous attempts to observe the occurrence of dynamic ferritic transformation at temperatures even above Ae3 in a low-carbon steel, and not only in steels, but recently also in titanium alloys. In this study, a new approach is proposed that involves treating true stress-true strain curves in uniaxial.....
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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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냉간압연 된 304 오스테나이트 스테인리스강의 열처리에 의한 기계적 특성 평가
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박민하, 김광윤, 장재호, 김형찬, 문형석, 전종배, 남대근, 손근용, 김병준
Korean J. Met. Mater.
2018;56(7):490-498. Published online 2018 Jul 5
DOI:
https://doi.org/10.3365/KJMM.2018.56.7.490
Abstract
Austenitic stainless steels are widely used in a variety of industries, such as power plants, aerospace, automotive, construction and electronics, due to their excellent mechanical properties including ductility, toughness and corrosion resistance. For application in various industries, many parts and products require plastic processes such as cold rolling, cold forging.....
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Cited By 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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Cited By 5
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STS304의 후열처리에 따른 용접부 미세조직과 기계적 특성 평가
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장대한, 김광윤, 김형찬, 전종배, 남대근, 손근용, 김병준
Korean J. Met. Mater.
2017;55(9):664-670. Published online 2017 Aug 30
DOI:
https://doi.org/10.3365/KJMM.2017.55.9.664
Abstract
Austenitic stainless steels have excellent mechanical property and corrosion resistance, and are for these reasons used in demanding applications such as power plant, nuclear reactor and off-shore plant. Especially, austenitic stainless steel 304 (STS304) is mainly used as a pipe material in nuclear power plants. Submerged arc welding (SAW) is.....
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Cited By 1
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니켈감량 Fe-22Cr-9.5Mn-3.3Ni 오스테나이트강 주조재의 고온 변형성
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안상연, 송재숙, 홍순익
Korean J. Met. Mater.
2017;55(7):477-485. Published online 2017 Jul 4
DOI:
https://doi.org/10.3365/KJMM.2017.55.7.477
Abstract
The hot deformation behavior of as-cast and homogenized Fe-22Cr-9.5Mn-3.3Ni stainless steel was investigated over a temperature range between 600~1,250 ℃. The deformability of the as-cast Fe-22Cr-9.5Mn-3.3Ni steel decreased with increasing temperature up to 850 ℃, and then increased at temperatures between 900 and 1200 ℃ caused by dynamic recrystallization at.....
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전자기주조법으로 제조된 Al-12Si계 합금의 미세조직 및 고온 소성변형 거동
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전경수, 노흥렬, 김목순, 김종호, 박준표
Korean J. Met. Mater.
2017;55(6):386-395. Published online 2017 Jun 1
DOI:
https://doi.org/10.3365/KJMM.2017.55.6.386
Abstract
An as-received EMC/S (electromagnetic casting and stirring)-processed Al-12Si based alloy billet was homogenized to examine its microstructure and high temperature plastic deformation behavior, using compressive tests over the temperature range from 623 to 743 K and a strain rate range from 1.0×10
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공정지도를 이용한 AA6082 합금의 연속 동적 재결정 및 고온 변형 거동
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이상민, 이지운, 최현진, 현승균
Korean J. Met. Mater.
2016;54(11):793-801. Published online 2016 Nov 5
DOI:
https://doi.org/10.3365/KJMM.2016.54.11.793
Abstract
Torsion tests were performed on AA6082 samples to investigate their flow softening behavior and to determine optimum process conditions. Based on the experimental data and dynamic materials model, high strain processing maps were established which demonstrate the constitutive relationships among temperature, strain rate, strain and stress. The flow curves exhibited.....
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Cited By 4
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