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Comparison of Low Cryogenic Impact Toughness and Microstructure of GMAW (Gas Metal Arc Welding) and GTAW (Gas Tungsten Arc Welding) Weld Zone in 304L Stainless Steel for Liquid Hydrogen Tank
액화수소 저장 용기 제작을 위한 304L 스테인리스 강의 GMAW (Gas Metal Arc Welding) 및 GTAW (Gas Tungsten Arc Welding) 용접부의 초저온 충격인성 및 미세조직 비교
JaeHan Park, JeongYeol Park, YangDo Kim, ChangWook Ji박재한, 박정열, 김양도, 지창욱
Korean J. Met. Mater. 2025;63(5):344-355. Published online 2025 May 5 DOI: https://doi.org/10.3365/KJMM.2025.63.5.344
Abstract
To combat global climate change caused by CO 2 emissions, achieving net-zero emissions through sustainable energy solutions is a global priority. Among alternative energy carriers, hydrogen is a promising renewable energy source due to its efficiency in production, transportation, and storage. Liquefied hydrogen (LH 2) transportation is gaining attention as it significantly..... More
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Effect of High-Power Laser Cleaning for Surface Contaminants Removal on SS304L
SS304L 표면 오염물질 제거를 위한 고출력 레이저 클리닝 영향 분석
Soojin Choi, Hyun Jong Yoo, Jiyeon Choi, Jiwhan Noh, Heeshin Kang, Sanghoon Ahn, Junsu Park, Philgong Choi, Dohyun Kim, Yeonggyu Kim, Byeongju Kim, Ikgeun Jeon, Jeng O Kim, Hyonkee Sohn, Kyunghan Kim, Changkyoo Park최수진, 유현종, 최지연, 노지환, 강희신, 안상훈, 박준수, 최필공, 김도현, 김영규, 김병주, 전익근, 김정오, 손현기, 김경한, 박창규
Korean J. Met. Mater. 2024;62(2):73-80. Published online 2024 Jan 30 DOI: https://doi.org/10.3365/KJMM.2024.62.2.73
Abstract
In this study, artificially formed corrosion and paint layers on 304L stainless steel (SS304L) specimen were removed using a kilowatt level high-power Nd:YAG laser. A laser power of 1140 W and a pulse duration of 89 ns were used for the corrosion removal, and a laser power of 850 W..... More
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An Optimization of Manufacturing Process of SS304L Using Direct Energy Deposition Method
DED 공정에서의 SS304L 적층 조건 최적화
Sung Eun Kim, Sung Chan Yoo, Hyun-Gil Kim김성은, 유승찬, 김현길
Korean J. Met. Mater. 2022;60(11):819-826. Published online 2022 Oct 31 DOI: https://doi.org/10.3365/KJMM.2022.60.11.819
Abstract
The direct energy deposition (DED) method is an emerging manufacturing technique that has been recently highlighted due to its capabilities to coat materials with complex geometry for high temperature and highly corrosive environmental applications, such as steam turbine blade. Amongst metallic materials, SS304L has been reported to have superior corrosion..... More
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