Overview of dynamic strain aging and associated phenomena in Fe-Mn-C austenitic steels

Motomichi Koyama, Takahiro Sawaguchi, Kaneaki Tsuzaki

Research output: Contribution to journalReview article

5 Citations (Scopus)

Abstract

This paper presents an overview of the recent works on dynamic strain aging (DSA) of Fe-Mn-C austenitic steels including Hadfield and twinning-induced plasticity (TWIP) steels. First, a model of the DSA mechanism and its controlling factors are briefly explained in terms of Mn-C coupling and dislocation separation. Then, we introduce the effects of DSA on mechanical properties such as work hardening capability, uniform elongation, post-uniform elongation, and fatigue strength. Specifically, we note the pinning effect on extended dislocation for the work hardening, the Poretvin-Le Chatelier banding effect on damage evolution for the elongation, and the crack tip hardening/softening effect on crack resistance for the fatigue strength. We believe that this overview will help in designing advanced high-strength steels with superior ductility and fatigue resistance.

Original languageEnglish
Pages (from-to)187-200
Number of pages14
JournalTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
Volume104
Issue number4
DOIs
Publication statusPublished - 2018 Apr
Externally publishedYes

Keywords

  • Dynamic strain aging
  • Fatigue
  • High Mn austenitic steel
  • Premature fracture
  • Serrated flow
  • Work hardening

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Metals and Alloys
  • Materials Chemistry

Fingerprint Dive into the research topics of 'Overview of dynamic strain aging and associated phenomena in Fe-Mn-C austenitic steels'. Together they form a unique fingerprint.

  • Cite this