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Microstructural characterization of the austenite behaviour during metadynamic recrystallization

conference contribution
posted on 2011-01-01, 00:00 authored by Hossein BeladiHossein Beladi, Pavel CizekPavel Cizek, Peter HodgsonPeter Hodgson
The work discusses the recent findings obtained from the microstructural characterization of an austenitic Ni-30� model alloy during metadynamic recrystallization (MDRX) using both EBSD and TEM techniques. The characterization of the grain structure, texture and dislocation substructure evolution of the fully dynamically recrystallized (DRX) microstructure during post deformation annealing revealed a novel softening mechanism occurring under the current experimental conditions. It is proposed that the initial softening stage involves rapid growth of the dynamically formed nuclei and migration of the mobile boundaries in correspondence with the well-established MDRX mechanism. However, the sub-boundaries within DRX grains progressively disintegrate through dislocation climb and dislocation annihilation, which ultimately leads to the formation of dislocation-free grains. Consequently, the DRX texture largely remains preserved throughout the annealing process.

History

Event

ATCOM : International Conference on Advances in Analytical Techniques and Characterization of Materials (2011 : Ranchi, India)

Publisher

[ATCOM]

Location

Ranchi, India

Place of publication

[Ranchi, India]

Start date

2011-07-05

End date

2011-07-07

Language

eng

Publication classification

E2 Full written paper - non-refereed / Abstract reviewed

Copyright notice

2011, ATCOM

Title of proceedings

ATCOM 2011 : Proceedings of the International Conference on Advances in Analytical Techniques and Characterization of Materials

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