The mechanism of nucleation of hydrogen blister in metals
- 期刊名字:科学通报(英文版)
- 文件大小:
- 论文作者:REN XueChong,ZHOU QingJun,CHU
- 作者单位:Department of Materials Physics
- 更新时间:2023-02-26
- 下载次数:次
论文简介
The nucleating, growing and cracking of hydrogen blister have been investigated experimentally and theoretically. The results show that atomic hydrogen induces superabundant vacancies in metals. The superabundant vacancies and hydrogen aggregate into a hydrogen-vacancy cluster (microcavity). The hydrogen atoms in the microcavity become hydrogen molecules which can stabilize the cluster. And the hydrogen blister nucleates. With the entry of vacancies and hydrogen atoms, the blister nucleus grows and the pressure in the cavity increases. When the stress induced by hydrogen pressure on the blister is up to the cohesive strength, cracks will initiate from the wall of the blister.
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