Grain Refinement by Cyclic Displacive Forward/Reverse Transformation in Fe-High-Ni Alloys

Tadachika Chiba, Hassan Shirazi, Goro Miyamoto, Tadashi Furuhara

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

A novel method for grain refinement of martensite structures was proposed, in which transformation strain is accumulated by cyclic displacive forward and reverse transformations. This method can refine martensite structures in an Fe-18Ni alloy because a high density of austenite dislocations is introduced by a displacive reverse transformation in addition to an inheritance of dislocations in body-centered cubic martensite into austenite during cyclic transformation. The addition of a small amount of carbon accelerates structure refinement significantly, which results in the formation of ultra-fine-grained structures after ten cycles.

Original languageEnglish
Pages (from-to)4204-4210
Number of pages7
JournalMetallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Volume48
Issue number9
DOIs
Publication statusPublished - 2017 Sep 1

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys

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