Microstructure evolution during hot deformation of REX734 austenitic stainless steel

Research output: Contribution to journalArticle

2 Citations (Scopus)
1 Downloads (Pure)

Abstract

Mechanical properties of a REX734 austenitic stainless steel were examined through compression testing over a wide range of temperatures (1173 to 1373 K (900 to 1100 °C)) and strain rates (0.1 to 40 s-1) that cover deformation conditions encountered in different metalworking processes. The evolution of microstructure was studied using electron microscopy combined with electron backscatter diffraction and energy dispersive spectroscopy. Partially recrystallized microstructures were obtained after compression testing at 1173 K (900 °C), while after deformation at 1273 and 1373 K (1000 and 1100 °C) the material was fully recrystallized almost in all examined cases. The role dynamic and metadynamic restoration processes in the formation of final microstructure was investigated. Σ3 twin boundaries lost their twin character and transformed into general high-angle grain boundaries as a result of deformation, while during recrystallization new Σ3 twin boundaries formed. The evolution of precipitates during compression testing and their role in the recrystallization process was also discussed.
Original languageEnglish
Pages (from-to)845-854
Number of pages10
JournalMetallurgical and Materials Transactions A
Volume51
Issue number2
Early online date4 Dec 2019
DOIs
Publication statusPublished - 29 Feb 2020

Keywords

  • austenitic stainless steel
  • hot deformation
  • recovery
  • recrystallization
  • electron backscatter diffraction
  • grain boundary character distribution (GBCD)

Fingerprint Dive into the research topics of 'Microstructure evolution during hot deformation of REX734 austenitic stainless steel'. Together they form a unique fingerprint.

  • Cite this