Hydrogen trapping in carbon supersaturated α‑iron and its decohesion effect in martensitic steel

W. T. Geng, Vei Wang, Jin Xu Li, Nobuyuki Ishikawa, Hajime Kimizuka, Kaneaki Tsuzaki, Shigenobu Ogata

研究成果: Contribution to journalArticle査読

15 被引用数 (Scopus)

抄録

Our first-principles calculations demonstrate that hydrogen is more stable in carbon supersaturated martensite than in α‑iron, due to the carbon-induced tetragonality in martensite lattice. The trapped hydrogen leads to remarkable decohesion between (110) planes both inside the martensite and along the martensite/ferrite interface, with the former being more significant than the latter. This decohesion can explain recent precise observations that in martensite/ferrite dual-phase steels the hydrogen-promoted crack was initiated in the martensite region and that in lath martensite steel it propagated not on lath boundaries but showed quasi-cleavage feature along (110) planes at very high hydrogen concentration.

本文言語英語
ページ(範囲)79-83
ページ数5
ジャーナルScripta Materialia
149
DOI
出版ステータス出版済み - 5 2018

All Science Journal Classification (ASJC) codes

  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学
  • 金属および合金

フィンガープリント

「Hydrogen trapping in carbon supersaturated α‑iron and its decohesion effect in martensitic steel」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル