EBSD study of the orientation dependence of substructure characteristics in a model Fe-30wt%Ni alloy subjected to hot deformation

Cizek, P., Bai, F., Palmiere, E.J. and Rainforth, W.M. 2005, EBSD study of the orientation dependence of substructure characteristics in a model Fe-30wt%Ni alloy subjected to hot deformation, Journal of microscopy, vol. 217, no. 2, pp. 138-151.

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Title EBSD study of the orientation dependence of substructure characteristics in a model Fe-30wt%Ni alloy subjected to hot deformation
Author(s) Cizek, P.
Bai, F.
Palmiere, E.J.
Rainforth, W.M.
Journal name Journal of microscopy
Volume number 217
Issue number 2
Start page 138
End page 151
Publisher Wiley-Blackwell
Place of publication Oxford, England
Publication date 2005-02
ISSN 0022-2720
1365-2818
Keyword(s) austenitic model alloy
subgrain structure
hot deformation
electron backscatter diffraction
crystallographic texture
Summary The aim of the present investigation was to determine the orientation dependence of substructure characteristics in an austenitic Fe−30wt%Ni model alloy subjected to hot plane strain compression. Deformation was carried out at a temperature of 950 °C using a strain rate of 10 s−1 to equivalent strain levels of approximately 0.2, 0.4, 0.6 and 0.8. The specimens obtained were analysed using a fully automatic electron backscatter diffraction technique. The crystallographic texture was characterized for all the strain levels studied and the subgrain structure was quantified in detail at a strain of 0.4. The substructure characteristics displayed pronounced orientation dependence. The major texture components, namely the copper, S, brass, Goss and rotated Goss, generally contained one or two prominent families of parallel larger-angle extended subboundaries, the traces of which on the longitudinal viewing plane appeared systematically aligned along the {111} slip plane traces, bounding long microbands subdivided into slightly elongated subgrains by short lower-angle transverse subboundaries. Relatively rare cube-orientated grains displayed pronounced subdivision into coarse deformation bands containing large, low-misorientated subgrains. The misorientation vectors across subboundaries largely showed a tendency to cluster around the sample transverse direction. Apart from the rotated Goss texture component, the stored energy levels for the remaining components were principally consistent with the corresponding Taylor factor values.
Language eng
Field of Research 091207 Metals and Alloy Materials
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2005, The Royal Microscopical Society
Persistent URL http://hdl.handle.net/10536/DRO/DU:30025787

Document type: Journal Article
Collection: Centre for Material and Fibre Innovation
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