Plastic Stability of Retained Austenite in the Cold-rolled 0.14%C-1.9%Si-1.7%Mn Sheet Steel

Atsushi Itami, Manabu Takahashi, Kosaku Ushioda

Research output: Contribution to journalArticlepeer-review

112 Citations (Scopus)

Abstract

Mechanical properties of a 0.14%C-1.9%Si-1.7%Mn TRIP steel have been studied especially from the aspect of the plastic stability of retained austenite which was varied by changing bainite transformation time at 400°C. The plastic stability of retained austenite and the strength-ductility balance at room temperature are improved with the increase in C content in retained austenite after optimizing the bainite transformation time in the continuous annealing process. Martensitic transformation can occur from the plastically unstable retained austenite with low C content. The kinetics model for deformation-induced martensitic transformation explains the experimentally obtained change in volume fraction of retained austenite with plastic strain in terms of the C content in retained austenite.

Original languageEnglish
Pages (from-to)1121-1127
Number of pages7
Journalisij international
Volume35
Issue number9
DOIs
Publication statusPublished - 1995
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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