Determination of critical strain for initiation of dynamic recrystallization

Soheil Solhjoo*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

48 Citations (Scopus)

Abstract

Using the work hardening rate-strain curves, an effective mathematical model has been developed to predict the stress-strain curves of alloy steel during hot deformation up to the peak stress regardless of the level of the strain, weather smaller or larger than the critical strain. This model is expressed in terms of peak stress, peak strain and one temperature-sensitive parameter, S. In addition, one new model, which is a function of peak strain, was proposed to predict the critical strain for the initiation of dynamic recrystallization using the second derivative of work hardening rate with respect to stress. Besides the theoretical study, the analysis is used to determine the stress-strain curves and critical strain of 304 austenitic stainless steel. The predicted results were found to be in accord with the experimental data. (C) 2009 Elsevier Ltd. All rights reserved.

Original languageEnglish
Pages (from-to)1360-1364
Number of pages5
JournalMaterials & design
Volume31
Issue number3
DOIs
Publication statusPublished - Mar-2010
Externally publishedYes

Keywords

  • Ferrous metals and alloys
  • Forming
  • Plastic behavior
  • LOW-CARBON-STEEL
  • LOW-ALLOY
  • MICROALLOYED STEELS
  • FLOW-STRESS
  • METADYNAMIC RECRYSTALLIZATION
  • CHEMICAL-COMPOSITION
  • HIGH-TEMPERATURES
  • HOT DEFORMATION
  • 42CRMO STEEL
  • AUSTENITE

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