Martensite-to-austenite reversion and recrystallization in cryogenically-rolled type 321 metastable austenitic steel

A. Aletdinov, S. Mironov, G. F. Korznikova, T. Konkova, R. G. Zaripova, M. M. Myshlyaev, S. L. Lee Semiatin

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The annealing behavior of cryogenically-rolled type 321 metastable austenitic steel was established. Cryogenic deformation gave rise to martensitic transformation which developed preferentially within deformation bands. Subsequent annealing in the range of 600 C to 700 C resulted in reversion of the strain-induced martensite to austenite. At 800 C, the reversion was followed by static recrystallization. At relatively-low temperatures, the reversion was characterized by a very strong variant selection, which led to the restoration of the crystallographic orientation of the coarse parent austenite grains. An increase in the annealing temperature relaxed the variant-selection tendency and provided subsequent recrystallization thus leading to significant grain refinement. Nevertheless, a significant portion of the original coarse grains was
found to be untransformed and therefore the fine-grain structure was fairly heterogeneous.
Original languageEnglish
Pages (from-to)1346-1357
Number of pages12
JournalMetallurgical and Materials Transactions A
Volume50
Issue number3
Early online date11 Dec 2018
DOIs
Publication statusPublished - 31 Mar 2019

Keywords

  • cryogenic deformation
  • cryogenically-rolled type 321
  • metastable austenitic steel

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