On the characteristics of substructure development through dynamic recrystallization

Beladi, Hossein, Cizek, Pavel and Hodgson, Peter D. 2010, On the characteristics of substructure development through dynamic recrystallization, Acta materialia, vol. 58, no. 9, pp. 3531-3541, doi: 10.1016/j.actamat.2010.02.026.

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Title On the characteristics of substructure development through dynamic recrystallization
Author(s) Beladi, HosseinORCID iD for Beladi, Hossein orcid.org/0000-0003-0131-707X
Cizek, Pavel
Hodgson, Peter D.
Journal name Acta materialia
Volume number 58
Issue number 9
Start page 3531
End page 3541
Total pages 11
Publisher Elsever BV
Place of publication Amsterdam, The Netherlands
Publication date 2010-05
ISSN 1359-6454
1873-2453
Keyword(s) dynamic recrystallization
substructure
austenite
hot torsion
crystallographic texture
Summary Substructure development in an austenitic Ni-30%Fe model alloy was investigated within a dynamic recrystallization (DRX) regime. The substructure characteristics of the deformed matrix and DRX grains were markedly different regardless of the grain size and orientation. The former largely displayed 'organized', banded subgrain arrangements with alternating misorientations, resulting from a limited number of active slip systems. In contrast, the substructure of DRX grains was generally more 'random' and exhibited complex subgrain/cell arrangements characterized by local accumulation of misorientations, suggesting multiple slip. The proposed mechanism of the unique substructure development within DRX grains suggests that the DRX nuclei, forming along pre-existing grain boundaries and triple points, essentially represent grain boundary regions, which experience multiple slip to preserve the compatibility with neighbouring deformed grains. This results in the formation of a complex cell/subgrain structure, which progressively extends as the grain boundary regions expand outwards during DRX growth.
Language eng
DOI 10.1016/j.actamat.2010.02.026
Field of Research 091207 Metals and Alloy Materials
Socio Economic Objective 861202 Machined Metal Products
HERDC Research category C1 Refereed article in a scholarly journal
HERDC collection year 2010
Related work DU:30036734
Copyright notice ©2010, Elsevier
Persistent URL http://hdl.handle.net/10536/DRO/DU:30034392

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