Metallurgical and Materials Transactions A

, Volume 39, Issue 6, pp 1371–1381

Hot Deformation and Recrystallization of Austenitic Stainless Steel: Part II. Post-deformation Recrystallization

Article

DOI: 10.1007/s11661-008-9513-6

Cite this article as:
Dehghan-Manshadi, A., Barnett, M. & Hodgson, P. Metall and Mat Trans A (2008) 39: 1371. doi:10.1007/s11661-008-9513-6

Abstract

The postdeformation recrystallization behavior of a hot-deformed austenitic stainless steel was investigated based on the first part of this study, in which the microstructure development during hot deformation and, in particular, the evolution of dynamic recrystallization (DRX), was studied. The effect of different parameters such as strain, strain rate, and temperature were examined. The dependency of the time for 50 pct softening, t50, changed from “strain dependent” to “strain independent” at a transition strain (ε*) that was in the steady-state area of the hot deformation flow curve. The fully recrystallized microstructure showed a similar transition in strain sensitivity. However, this occurred at stains greater than ε*. A mathematical model was developed to predict the transition strain under different deformation conditions. Microstructural measurements show that the transition strain corresponds to approximately 50 pct DRX in the deformed structure at the point of unloading.

Copyright information

© The Minerals, Metals & Materials Society and ASM International 2008

Authors and Affiliations

  • A. Dehghan-Manshadi
    • 1
  • M.R. Barnett
    • 2
  • P.D. Hodgson
    • 2
  1. 1.Faculty of EngineeringUniversity of WollogongWollogongAustralia
  2. 2.Centre for Materials and Fibre InnovationDeakin UniversityGeelongAustralia