Hydrogen-assisted damage in austenite/martensite dual-phase steel

Motomichi Koyama, Cemal Cem Tasan, Tatsuya Nagashima, Eiji Akiyama, Dierk Raabe, Kaneaki Tsuzaki

研究成果: Contribution to journalArticle査読

20 被引用数 (Scopus)

抄録

For understanding the underlying hydrogen embrittlement mechanism in transformation-induced plasticity steels, the process of damage evolution in a model austenite/martensite dual-phase microstructure following hydrogenation was investigated through multi-scale electron channelling contrast imaging and in situ optical microscopy. Localized diffusible hydrogen in martensite causes cracking through two mechanisms: (1) interaction between {1 1 0}M localized slip and {1 1 2}M twin and (2) cracking of martensite-martensite grain interfaces. The former resulted in nanovoids along the {1 1 2}M twin. The coalescence of the nanovoids generated plate-like microvoids. The latter caused shear localization on the specific plane where the crack along the martensite/martensite boundary exists, which led to additional martensite/martensite boundary cracking.

本文言語英語
ページ(範囲)9-18
ページ数10
ジャーナルPhilosophical Magazine Letters
96
1
DOI
出版ステータス出版済み - 1 2 2016

All Science Journal Classification (ASJC) codes

  • 凝縮系物理学

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