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Orientation dependence of the substructure characteristics in a Ni- 30� austenitic alloy deformed in hot torsion

journal contribution
posted on 2013-01-01, 00:00 authored by Pavel CizekPavel Cizek, Hossein BeladiHossein Beladi, Adam Taylor, Peter HodgsonPeter Hodgson
The present work examines the microstructure and texture evolution in a Ni-30wt.� austenitic model alloy deformed in torsion at 1000 °C, with a particular emphasis on the orientation dependence of the substructure characteristics within the deformed original grains. Texture of these grains was principally consistent with that expected for simple shear and comprised the main A, B and C components. The deformation substructure within the main texture component grains was characterised by "organised" arrays of parallel microbands with systematically alternating misorientations, locally accompanied by micro-shear bands within the C grains. With increasing strain, the mean subgrain size gradually decreased and the mean misorientation angle concurrently increased towards the saturation. The stored deformation energy within the main texture component grains was principally consistent with the respective Taylor factor values. The microband boundaries corresponded to the expected single slip {111} plane for the A oriented grains while these boundaries for the C oriented grains represented a variety of planes even for a single grain.

History

Journal

Materials science forum

Volume

753

Pagination

54 - 57

Publisher

Trans Tech Publications

Location

Stafa-Zurich, Switzerland

ISSN

0255-5476

Language

eng

Publication classification

C1 Refereed article in a scholarly journal

Copyright notice

2013, Trans Tech Publications