Lee, Junghoon Park, Hanji Kim, Myeonghyun Kim, Han-Jin Suh, Jin-yoo Kang, Namhyun 2024-01-19T15:33:59Z 2024-01-19T15:33:59Z 2022-01-10 2021-01 1598-9623 https://pubs.kist.re.kr/handle/201004/117579 We investigated the effects of hydrogen and temperature on hydrogen embrittlement (HE) of cold-rolled equimolar CoCrFeMnNi high-entropy alloy (HEA). The HE exhibited intergranular fracture in this HEA at 298 and 177 K. At 177 K, more twins formed than at 298 K, and this acted as a hydrogen-diffusion path. During deformation, local stress was concentrated at the triple junction consisting of grain and twin boundaries. Hydrogen diffused predominantly along the boundary and encountered stress-concentration regions. Cracks initiated and propagated predominantly through the grain/twin boundaries by hydrogen diffusion at 298 and 177 K. Therefore, HE occurred at 298 and 177 K. At 77 K, hydrogen was distributed throughout the specimen as twin formation was more active. The cryogenic temperature of 77 K caused the hydrogen to become trapped and thus not diffuse into the stress-concentration region. Thus, there was no significant HE at 77 K. Graphic abstract English KOREAN INST METALS MATERIALS AUSTENITIC STAINLESS-STEELS DIFFUSION-COEFFICIENT INDUCED CRACKING TENSILE RESISTANCE PRESTRAIN BEHAVIOR GRAIN MN Role of Hydrogen and Temperature in Hydrogen Embrittlement of Equimolar CoCrFeMnNi High-entropy Alloy Article 10.1007/s12540-020-00752-3 1 METALS AND MATERIALS INTERNATIONAL, v.27, no.1, pp.166 - 174 METALS AND MATERIALS INTERNATIONAL 27 1 166 174 scie scopus kci ART002671468 000534449600002 2-s2.0-85085027894 Materials Science, Multidisciplinary Metallurgy & Metallurgical Engineering Materials Science Metallurgy & Metallurgical Engineering Article AUSTENITIC STAINLESS-STEELS DIFFUSION-COEFFICIENT INDUCED CRACKING TENSILE RESISTANCE PRESTRAIN BEHAVIOR GRAIN MN Hydrogen embrittlement High-entropy alloy Hydrogen diffusion Intergranular fracture