Inverse grain size dependence of critical strain for serrated flow in a Fe-Mn-C twinning-induced plasticity steel

Motomichi Koyama, Takahiro Sawaguchi, Kaneaki Tsuzaki

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

The grain size dependence of critical strain for serrations associated with dynamic strain aging has been examined in a twinning-induced plasticity steel. Tensile tests were conducted at various deformation temperatures and strain rates in a Fe-17Mn-0.6C steel (mass%) with grain sizes 3.5, 10, 23, 37, and 44 μm. In addition, the carbon concentration varied from 0.3 to 0.8 in the Fe-17Mn-xC steels with coarse grains. The critical strain for the onset of serrations was found to show an inverse grain size dependence, i.e., the critical strain increased with the decrease in grain size, the opposite of what occurs in conventional alloys.

Original languageEnglish
Pages (from-to)145-152
Number of pages8
JournalPhilosophical Magazine Letters
Volume92
Issue number3
DOIs
Publication statusPublished - Mar 1 2012

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twinning
plastic properties
grain size
steels
precipitation hardening
tensile tests
strain rate
carbon
temperature

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

Cite this

Inverse grain size dependence of critical strain for serrated flow in a Fe-Mn-C twinning-induced plasticity steel. / Koyama, Motomichi; Sawaguchi, Takahiro; Tsuzaki, Kaneaki.

In: Philosophical Magazine Letters, Vol. 92, No. 3, 01.03.2012, p. 145-152.

Research output: Contribution to journalArticle

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