Plastic deformation sequence and strain gradient characteristics of hydrogen-induced delayed crack propagation in single-crystalline Fe–Si alloy

Thanh Thuong Huynh, Motomichi Koyama, Yoshimasa Takahashi, Shigeru Hamada, Kaneaki Tsuzaki, Hiroshi Noguchi

Research output: Contribution to journalArticlepeer-review

Abstract

Microscopic features of hydrogen-induced delayed crack propagation in a thin sheet of single-crystalline Fe-3wt%Si alloy were investigated. The crack tip plastic deformation associated with the effect of hydrogen during the crack propagation leaves three adjacent regions where different plastic strain gradients and dislocation densities are observed. These regions revealed the effects of plastic deformation and hydrogen-dislocations interaction around the crack tip on the rate-limiting process of hydrogen-induced delayed crack propagation in thin specimens.

Original languageEnglish
Pages (from-to)99-103
Number of pages5
JournalScripta Materialia
Volume178
DOIs
Publication statusPublished - 2020 Mar 15

Keywords

  • Crack propagation
  • Delayed fracture
  • Hydrogen
  • Steel

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys

Fingerprint Dive into the research topics of 'Plastic deformation sequence and strain gradient characteristics of hydrogen-induced delayed crack propagation in single-crystalline Fe–Si alloy'. Together they form a unique fingerprint.

Cite this