A novel methodology to estimate hydrogen diffusivity and its applications in revealing hydrogen effects in CoCrNi medium-entropy alloy versus 316L stainless steel

Dong-Hyun Lee, Yun Hee An,Yakai Zhao,Ju Hyeok Lee,Hyun You Kim,You Sub Kim,Soo Yeol Lee

INTERNATIONAL JOURNAL OF PLASTICITY（2023）

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摘要

•A novel method to estimate hydrogen diffusivity via nanoindentation was proposed.•CoCrNi MEA shows 0.7 times higher hydrogen diffusivity than SS316L.•The high Ni content in CoCrNi MEA enhances the hydrogen diffusivity.•Hydrogen-vacancy interaction caused hardening-softening competition in CoCrNi MEA.

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关键词

Nanoindentation,Hardness,Hydrogen diffusivity,Face-centered cubic,Stainless steel,Medium-entropy alloy

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