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

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

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)9-18
Number of pages10
JournalPhilosophical Magazine Letters
Volume96
Issue number1
DOIs
Publication statusPublished - Jan 2 2016

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austenite
martensite
steels
damage
hydrogen
hydrogen embrittlement
plastic properties
coalescing
hydrogenation
slip
cracks
shear
microscopy
microstructure
causes

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

Cite this

Hydrogen-assisted damage in austenite/martensite dual-phase steel. / Koyama, Motomichi; Tasan, Cemal Cem; Nagashima, Tatsuya; Akiyama, Eiji; Raabe, Dierk; Tsuzaki, Kaneaki.

In: Philosophical Magazine Letters, Vol. 96, No. 1, 02.01.2016, p. 9-18.

Research output: Contribution to journalArticle

Koyama, Motomichi ; Tasan, Cemal Cem ; Nagashima, Tatsuya ; Akiyama, Eiji ; Raabe, Dierk ; Tsuzaki, Kaneaki. / Hydrogen-assisted damage in austenite/martensite dual-phase steel. In: Philosophical Magazine Letters. 2016 ; Vol. 96, No. 1. pp. 9-18.
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