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

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 - Apr 1 2018

Fingerprint

precipitation hardening
Austenitic steel
Carbon steel
Elongation
Aging of materials
steels
elongation
Strain hardening
work hardening
Steel
Twinning
High strength steel
Crack tips
Plasticity
high strength steels
Ductility
Hardening
crack tips
twinning
ductility

All Science Journal Classification (ASJC) codes

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

Cite this

Overview of dynamic strain aging and associated phenomena in Fe-Mn-C austenitic steels. / Koyama, Motomichi; Sawaguchi, Takahiro; Tsuzaki, Kaneaki.

In: Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan, Vol. 104, No. 4, 01.04.2018, p. 187-200.

Research output: Contribution to journalReview article

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