Review of Hydrogen Embrittlement in Metals: Hydrogen Diffusion, Hydrogen Characterization, Hydrogen Embrittlement Mechanism and Prevention
Xinfeng Li1,2(), Xianfeng Ma1, Jin Zhang3, Eiji Akiyama4, Yanfei Wang5(), Xiaolong Song2

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Fig.10. a Ni film cracking at 8% strain (1 MPa hydrogen gas, - 50°) [87]; b Cu film defects, 1 micropores; 2 cracks; 3 voids [87]; c non-densely spherical structure Al film [87]