ISIJ International
Online ISSN : 1347-5460
Print ISSN : 0915-1559
ISSN-L : 0915-1559
Hydrogen Effects on the Migration of Nanoscale Cavities in Iron
Kazuto ArakawaAkira KageyamaHideto HiroshimaHidehiro YasudaShigenobu Ogata
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JOURNALS OPEN ACCESS Advance online publication

Article ID: ISIJINT-2021-140


Accurate knowledge of the influence of hydrogen on the behavior of vacancies and vacancy clusters is crucial for understanding the mechanism of hydrogen embrittlement of α-iron and its alloys. Using in-situ transmission electron microscopy, we examined the effects of hydrogen on the behavior of nanoscale cavities under heating, by comparison between the behaviors of cavities without hydrogen produced upon high-energy electron irradiation and those with hydrogen produced upon electro-deposition. It is revealed that hydrogen promotes the migration of cavities, in contrast to a traditional notion.

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