Importance of shear in the bcc-to-hcp transformation in iron

Kyle J. Caspersen, Adrian Lew, Michael Ortiz, Emily A. Carter

Research output: Contribution to journalArticle

104 Scopus citations

Abstract

A multiscale model containing a multiwell energy function, based on quantum-mechanics, accounting for the body centered cubic (bcc) and hexagonally clos-packed (hcp) phases of Fe, and a construction of kinematically compatible and equilibrated mixed phases were presented. Using the model, the influence of shear stresses on the bcc↔hcp transformation was demonstrated. The presence of a modest shear, which accounts for the scatter in measured transformation pressure (TP) were also demonstrated. The formation of mixed phases, which provides an explanation for the observed hysterisis in TP was also investigated.

Original languageEnglish (US)
Article number115501
Pages (from-to)115501-1-115501-4
JournalPhysical review letters
Volume93
Issue number11
DOIs
StatePublished - Sep 10 2004
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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