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The mechanism of nucleation of hydrogen blister in metals

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  • Metallic Material
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Chinese Science Bulletin

Abstract

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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Correspondence to Ren XueChong.

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Supported by the National Natural Science Foundation of China (Grant No. 50471096)

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Ren, X., Zhou, Q., Chu, W. et al. The mechanism of nucleation of hydrogen blister in metals. Chin. Sci. Bull. 52, 2000–2005 (2007). https://doi.org/10.1007/s11434-007-0269-y

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  • DOI: https://doi.org/10.1007/s11434-007-0269-y

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