A comparative study on intrinsic mobility of incoherent and semicoherent interfaces during the austenite to ferrite transformation

Haokai Dong, Yongjie Zhang, Goro Miyamoto, Hao Chen, Zhigang Yang, Tadashi Furuhara

Research output: Contribution to journalArticle

Abstract

A straightforward approach to experimentally determine intrinsic interface mobility as well as extrinsic energy dissipation is proposed based on the measurements of total energy dissipation and interface velocity. These parameters have been comparatively studied for incoherent allotriomorphic ferrite (AF) and semicoherent Widmanstätten ferrite (WF) in an Fe-C alloy. It reveals that extrinsic energy dissipation for AF is negligibly small whereas that for WF is about 20J/mol, which should correspond to the dissipation by associated transformation strain. Furthermore, the intrinsic mobility of the semicoherent WF/austenite interface is found to be much smaller than the incoherent AF/austenite interface counterpart.

Original languageEnglish
Pages (from-to)59-63
Number of pages5
JournalScripta Materialia
Volume188
DOIs
Publication statusPublished - 2020 Nov

Keywords

  • Energy dissipation
  • Ferrite transformation
  • Interface character
  • Interface migration
  • Intrinsic mobility

ASJC Scopus subject areas

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

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