Substructure and texture characteristics of the deformed matrix and dynamically recrystallized grains in a Ni-30%Fe austenitic alloy

Cizek, Pavel, Beladi, Hossein and Hodgson, Peter D. 2012, Substructure and texture characteristics of the deformed matrix and dynamically recrystallized grains in a Ni-30%Fe austenitic alloy, Materials science forum, vol. 715-716, pp. 180-185.

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Title Substructure and texture characteristics of the deformed matrix and dynamically recrystallized grains in a Ni-30%Fe austenitic alloy
Author(s) Cizek, Pavel
Beladi, HosseinORCID iD for Beladi, Hossein orcid.org/0000-0003-0131-707X
Hodgson, Peter D.
Journal name Materials science forum
Volume number 715-716
Start page 180
End page 185
Total pages 6
Publisher Trans Tech Publications
Place of publication Stafa-Zurich, Switzerland
Publication date 2012-04
ISSN 0255-5476
Keyword(s) dynamic recrystallization
Ni-30%Fe austenitic alloy
hot torsion
dislocation substructure
crystallographic texture
Summary The substructure and crystallographic texture characteristics of both the deformed matrix and dynamically recrystallized (DRX) grains were investigated in a Ni-30%Fe austenitic model alloy subjected to hot torsion. Deformation was performed at a temperature of 1000°C using strain rates of 1, 0.1 and 0.01 s-1, which produced a range of DRX grain sizes. Electron back-scattered diffraction and transmission electron microscopy were employed in the investigation. Both the deformed matrix and DRX grains revealed the texture components expected for simple shear deformation by crystallographic slip. The texture of DRX grains was dominated by low Taylor factor components as a result of their lower consumption rate during growth of these grains. There was a marked difference in the substructure characteristics between the deformed matrix and DRX grains regardless of the grain size and orientation. The deformed matrix substructure was largely characterized by organized, banded subgrain arrangements with alternating misorientations. By contrast, the substructure of DRX grains was generally more random in character and displayed complex, more equiaxed subgrain/cell arrangements characterized by local accumulation of misorientations. Based on the experimental observations, a mechanism of the distinct substructure development within DRX grains has been proposed.
Language eng
Field of Research 091207 Metals and Alloy Materials
Socio Economic Objective 861103 Basic Iron and Steel Products
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2012, Trans Tech Publications
Persistent URL http://hdl.handle.net/10536/DRO/DU:30047040

Document type: Journal Article
Collections: Institute for Frontier Materials
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