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Hot deformation and recrystallization of austenitic stainless steel: Part 11. post-deformation recrystallization

journal contribution
posted on 2008-06-01, 00:00 authored by A Dehghan-Manshadi, Matthew BarnettMatthew Barnett, Peter HodgsonPeter Hodgson
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, t 50, 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.

History

Journal

Metallurgical and materials transactions A - physical metallurgy and materials science

Volume

39

Issue

6

Pagination

1371 - 1381

Publisher

Springer

Location

Boston, Mass.

ISSN

1073-5623

eISSN

1543-1940

Language

eng

Publication classification

C1 Refereed article in a scholarly journal

Copyright notice

2008, Springer