Microstructural damage evolution and arrest in binary Fe–high-Mn alloys with different deformation temperatures

Motomichi Koyama, Takahiro Kaneko, Takahiro Sawaguchi, Kaneaki Tsuzaki

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

We investigated the damage evolution behaviors of binary Fe–28–40Mn alloys (mass%) from 93 to 393 K by tensile testing. The underlying mechanisms of the microstructure-dependent damage evolution behavior were uncovered by damage quantification coupled with in situ strain mapping and post-mortem microstructure characterization. The damage growth behaviors could be classified into three types. In type I, the Fe–28Mn alloy at 93 K showed premature fracture associated with ductile damage initiation and subsequent quasi-cleavage damage growth associated with the ε -martensitic transformation. In type II, the Fe–28Mn alloy at 293 K and the Fe–32Mn alloy at 93 K showed delayed damage growth but did not stop growing. In type III, when the stacking fault energy was >19 mJ/m 2, the damage was strongly arrested until final ductile failure.

Original languageEnglish
Pages (from-to)193-206
Number of pages14
JournalInternational Journal of Fracture
Volume213
Issue number2
DOIs
Publication statusPublished - 2018 Oct 1
Externally publishedYes

Keywords

  • Damage evolution
  • Deformation twinning
  • Digital image correlation
  • Electron channeling contrast imaging
  • High-Mn austenitic steel
  • ε -martensite

ASJC Scopus subject areas

  • Computational Mechanics
  • Modelling and Simulation
  • Mechanics of Materials

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