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단결정 Ni기 초합금의 결정방위에 따른 수소 취화 민감도 평가
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윤희수, 다오반헝, 권휴상, 이지훈, 남승훈
Korean J. Met. Mater.
2025;63(5):389-398. Published online 2025 May 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.5.389
Abstract
As demand for hydrogen, a clean energy source, has increased, hydrogen embrittlement caused by hydrogen penetration into materials has became a major challenge. This study evaluated the effect of crystallographic orientation on hydrogen embrittlement sensitivity, using single-crystal Ni-based superalloys that are used in hydrogen gas turbines. The two crystallographic orientations.....
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압력용기용 SA372강의 수소취성에 미치는 Ni 함량과 템퍼링 온도의 영향
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신희창, 황병철
Korean J. Met. Mater.
2025;63(5):380-388. Published online 2025 May 5
DOI:
https://doi.org/10.3365/KJMM.2025.63.5.380
Abstract
This study investigates the influence of grain boundary characteristics on hydrogen embrittlement in SA372 steels by varying Ni content and tempering temperature. Microstructural characteristics and mechanical properties were analyzed to understand hydrogen trapping behavior, followed by an in-situ slow strain-rate test (SSRT) to assess hydrogen embrittlement resistance and hydrogen-induced fracture.....
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전기화학적 및 고압 수소 분위기하 템퍼드 마르텐사이트강의 수소취화 특성 비교
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김상규, 김재윤, 서현주, 정환교, 박재영, 백운봉, 황병철
Korean J. Met. Mater.
2023;61(11):807-814. Published online 2023 Oct 29
DOI:
https://doi.org/10.3365/KJMM.2023.61.11.807
Abstract
The effect of hydrogen charging methods on the hydrogen embrittlement characteristics of tempered martensitic steels were discussed in terms of hydrogen diffusion behavior. Two tempered martensitic steels with different Si content were fabricated by quenching and tempering. The steel with high Si content had a lower cementite fraction because the.....
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자동차용 초고강도 강재의 전기아연도금 시 음극전류 인가조건이 수소 유입, 취화 및 부식유기 수소취화 거동에 미치는 영향
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방혜린, 박진성, 김상헌, 김태엽, 오민석, 김성진
Korean J. Met. Mater.
2023;61(3):145-156. Published online 2023 Feb 24
DOI:
https://doi.org/10.3365/KJMM.2023.61.3.145
Abstract
The effects of the electrogalvanizing conditions (a combination of plating current and time) on hydrogen infusion, embrittlement, and corrosion-induced hydrogen embrittlement (HE) behaviors of ultra-high strength steel were examined. A range of experimental and analytical methods, including electrochemical impedance spectroscopy, hydrogen permeation, polarization, and slow strain rate test, were employed......
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Web of Science 4
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소부경화강의 변형 시효 및 수소취성 거동에 미치는 미세조직의 영향
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김재윤, 고석우, 황병철
Korean J. Met. Mater.
2022;60(11):811-818. Published online 2022 Oct 31
DOI:
https://doi.org/10.3365/KJMM.2022.60.11.811
Abstract
The strain aging and hydrogen embrittlement behavior of two bake hardening (BH) steels with different microstructures were investigated in this study. The single-phase BH steel was composed of fully ferrite, while the dual-phase BH steel consisted of ferrite and 3 % martensite. The BH index and aging index (AI) of.....
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Web of Science 4
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인장강도 600 MPa급 저탄소강 필렛 용접부의 저온균열과 미세조직에 따른 수소취성 민감성 및 수소확산 거동
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안형진, 이정훈, 박한지, 유재석, 정성욱, 박종민, 강남현
Korean J. Met. Mater.
2021;59(1):21-32. Published online 2021 Jan 5
DOI:
https://doi.org/10.3365/KJMM.2021.59.1.21
Abstract
Hydrogen flowing into a weld causes hydrogen embrittlement (HE), so to prevent cold cracks in the weld, HE must be suppressed. In this study, single-pass fillet weldments were fabricated using two different welding fillers with the same strength level as the American Welding Society standard. The specimen F-HNi, which had.....
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Web of Science 9
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페라이트-펄라이트 조직 저탄소강의 수소 취성에 미치는 Nb 첨가와 예비 변형의 영향
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고석우, 이지민, 황병철
Korean J. Met. Mater.
2020;58(11):752-758. Published online 2020 Oct 15
DOI:
https://doi.org/10.3365/KJMM.2020.58.11.752
Abstract
The effect of pre-strain on the hydrogen embrittlement of Nb-free and Nb-added low-carbon steels with ferrite-pearlite structure was investigated in this study. After the steels were electrochemically charged with hydrogen, slow-strain rate tensile (SSRT) tests were conducted on them to examine hydrogen embrittlement behavior. The SSRT test results revealed that.....
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Web of Science 4
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A516-65급 압력용기용 강재의 용접모사 열처리를 통한 용접열영향부의 수소확산 및 황화물응력균열 거동 연구
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조동민, 박진성, 이진우, 김성진
Korean J. Met. Mater.
2020;58(9):599-609. Published online 2020 Aug 13
DOI:
https://doi.org/10.3365/KJMM.2020.58.9.599
Abstract
Hydrogen diffusion and sulfide stress cracking of simulated heat-affected zone (HAZ) of A516- 65 grade steel were examined using an electrochemical permeation technique, glycerin volumetric method, and constant loading method. HAZ samples were fabricated using a metal thermal cycle simulator with a welding heat input of 20, 35, and 50.....
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Web of Science 5
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탄소함량이 자동차용 초고강도 철강소재의 부식 및 수소 확산 거동에 미치는 영향
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황은혜, 성환구, 김성진
Korean J. Met. Mater.
2018;56(8):570-579. Published online 2018 Aug 5
DOI:
https://doi.org/10.3365/KJMM.2018.56.8.570
Abstract
Recently developed ultra-strong GIGA STEEL exhibites superior mechanical properties, with a high tensile strength of more than 1.5 GPa and good impact toughness. Nevertheless, its application to auto parts has been severely restricted, mainly due to a substantial reduction in the resistance to hydrogen embrittlement (HE) induced by aqueous corrosion......
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Crossref 15
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수소 주입 방식에 따른 세 고망간강의 수소 취화 거동 비교
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이승용, 황병철
Korean J. Met. Mater.
2017;55(10):695-702. Published online 2017 Sep 28
DOI:
https://doi.org/10.3365/KJMM.2017.55.10.695
Abstract
In this study the hydrogen embrittlement characteristics of three high-manganese steels were tested using different hydrogen charging methods, and the results were compared with various Mn-containing steels. The results showed that the hydrogen embrittlement susceptibility of the high-manganese steels increased with increasing inherent strength because deformation mechanisms, such as deformation.....
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