Hydrogen-induced cracking at grain and twin boundaries in an Fe-Mn-C austenitic steel

Motomichi Koyama, Eiji Akiyama, Takahiro Sawaguchi, Dierk Raabe, Kaneaki Tsuzaki

Research output: Contribution to journalArticle

117 Citations (Scopus)

Abstract

Hydrogen embrittlement was observed in an Fe-18Mn-1.2C (wt.%) steel. The tensile ductility was drastically reduced by hydrogen charging during tensile testing. The fracture mode was mainly intergranular fracture, though transgranular fracture was also partially observed. The transgranular fracture occurred parallel to the primary and secondary deformation twin boundaries, as confirmed by electron backscattering diffraction analysis and orientation-optimized electron channeling contrast imaging. The microstructural observations indicate that cracks are initiated at grain boundaries and twin boundaries.

Original languageEnglish
Pages (from-to)459-462
Number of pages4
JournalScripta Materialia
Volume66
Issue number7
DOIs
Publication statusPublished - Apr 1 2012

All Science Journal Classification (ASJC) codes

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

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