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Characteristics of the deformed and recrystallised grains obtained after hot plane strain compression of a model Fe-30wt%Ni alloy

journal contribution
posted on 2004-10-01, 00:00 authored by F Bai, Pavel CizekPavel Cizek, E Palmiere, W Rainforth
The development of physically-based models of microstructural evolution during hot deformation of metallic materials requires knowledge of the grain/subgrain structure and crystallographic texture characteristics over a range of processing conditions. A Fe-30wt%Ni based alloy, retaining a stable austenitic structure at room temperature, was used for modelling the development of austenite microstructure during hot deformation of conventional carbon-manganese steels. A series of plane strain compression tests was carried out at a temperature of 950 °C and strain rates of 10 s-1 and 0.1 s-1 to several strain levels. Evolution of the grain/subgrain structure and crystallographic texture was characterised in detail using quantitative light microscopy and highresolution electron backscatter diffraction. Crystallographic texture characteristics were determined separately for the observed deformed and recrystallised grains. The subgrain geometry and dimensions together with the misorientation vectors across sub-boundaries were quantified in detail across large sample areas and the orientation dependence of these characteristics was determined. Formation mechanisms of the recrystallised grains were established in relation to the deformation microstructure.

History

Journal

Materials science forum

Volume

467

Issue

470

Pagination

21 - 26

Publisher

Trans Tech

Location

Stafa-Zurich, Switzerland

ISSN

0255-5476

Language

eng

Publication classification

C1.1 Refereed article in a scholarly journal

Copyright notice

2004, Trans Tech Publications, Switzerland

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