Transformation microyielding of retained austenite

G. N. Haidemenopoulos*, M. Grujicic, G. B. Olson, Morris Cohen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

28 Scopus citations

Abstract

The reversal in the temperature dependence of the elastic limit accurately determines the Mσs temperature of retained austenite in 4340 steel. Two models, one based on an exponential distribution of pre-existing nucleation sites and another based on an autocatalytic-site potency distribution, were compared in predicting the constitutive behavior of the steel in the stress-assisted transformation regime (T < Mσs). The autocatalytic-site potency distribution is in better agreement with the experimental stress-strain behavior and predicts reasonable values of the carbon enrichment of the retained austenite due to tempering. The decrease in the chemical driving force for the transformation of retained austenite due to carbon stabilization determines the elastic limit of the steel in the stress-assisted transformation regime.

Original languageEnglish (US)
Pages (from-to)1677-1682
Number of pages6
JournalActa Metallurgica
Volume37
Issue number6
DOIs
StatePublished - Jun 1989

ASJC Scopus subject areas

  • Engineering(all)

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