Evolution of grain boundaries and subboundaries in stainless steel during dynamic recrystallization

A. Belyakov, K. Tsuzaki, H. Miura, T. Sakai

Research output: Contribution to journalConference articlepeer-review

3 Citations (Scopus)

Abstract

The dynamic recrystallization (DRX) microstructures were studied in a 304-type stainless steel deformed at temperatures from 1023 K to 1223 K and at a strain rate of about 10-3 s-1. Both the dynamic grain size and the dynamic subgrain size were shown to depend on deformation conditions, and they could be expressed by different power-law functions of flow stresses. The subgrain size was related to the flow stress with a size exponent of about -1.0, while the grain size exponent was about -0.7. With increasing the deformation temperature, the fraction of the high-angle grain boundaries against all the strain-induced (sub)boundaries decreased from about 70% at 1023 K to 40% at 1223 K. The deformation microstructures are discussed in some detail with reference to the mechanisms of microstructure evolution that operated upon DRX.

Original languageEnglish
Pages (from-to)1005-1010
Number of pages6
JournalMaterials Science Forum
Volume426-432
Issue number2
DOIs
Publication statusPublished - Jan 1 2003
EventThermec 2003 Processing and Manufacturing of Advanced Materials - Madrid, Spain
Duration: Jul 7 2003Jul 11 2003

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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