Coalescence of martensite under uniaxial tension of iron crystallites by atomistic simulations

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Abstract

Molecular dynamics simulations are used to study the effects of tensile loading on nucleation and subsequent growth of bcc phase in pure fcc iron. The results show that orientation variant selection occurs during the stress-induced fcc-to-bcc transformation, which leads to the coalescence of neighbouring bcc platelets with identical orientation. The bcc phase nucleates mainly following Nishiyama–Wassermann and Kurdjumov–Sachs orientation relationships with the parent fcc phase. The present simulations contribute to a better understanding of mechanisms controlling mechanically induced martensitic transformation as well as coalescence of bcc platelets in steels.

Original languageEnglish
Pages (from-to)1191-1199
JournalMaterials Science and Technology (United Kingdom)
Volume36
Issue number11
DOIs
Publication statusPublished - 2020

Keywords

  • coalescence
  • iron
  • mechanically induced phase transformation
  • molecular dynamics simulation
  • Variant selection

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