EBSD characterization of cryogenically rolled type 321 austenitic stainless steel

Galia Korznikova, Sergey Mironov, Tatyana Konkova, Ainur Aletdinov, Rida Zaripova, Michail Myshlyaev, Sheldon Lee Semiatin

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Abstract

Electron backscatter diffraction was applied to investigate microstructure evolution during cryogenic rolling of type 321 metastable austenitic stainless steel. As expected, rolling promoted deformation-induced martensitic transformation which developed preferentially in deformation bands. Because a large fraction of the imposed strain was accommodated by deformation banding, grain refinement in the parent austenite phase was minimal. The martensitic transformation was found to follow a general orientation relationship, {111}γ||{0001}ε||{110}α′ and 〈110〉γ||〈11-20〉ε||〈111〉α′, and was characterized by noticeable variant selection.
Original languageEnglish
Pages (from-to)6325-6336
Number of pages12
JournalMetallurgical and Materials Transactions A
Volume49
Issue number12
Early online date17 Sep 2018
DOIs
Publication statusPublished - 31 Dec 2018

Keywords

  • metastable austenitic steel
  • ultrafine-grained structure
  • cryogenic deformation
  • electron backscatter diffraction
  • martensitic transformation

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