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Characterization on ferrite microstructure evolution during large strain warm torsion testing of plain low carbon steel

Eghbali, Beitallah, Abdollah-Zadeh, A., Beladi, Hossein and Hodgson, Peter 2006, Characterization on ferrite microstructure evolution during large strain warm torsion testing of plain low carbon steel, Materials science & engineering. A. Structural materials : properties, microstructure and processing, vol. 435-436, pp. 499-503, doi: 10.1016/j.msea.2006.07.026.

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Title Characterization on ferrite microstructure evolution during large strain warm torsion testing of plain low carbon steel
Author(s) Eghbali, Beitallah
Abdollah-Zadeh, A.
Beladi, Hossein
Hodgson, Peter
Journal name Materials science & engineering. A. Structural materials : properties, microstructure and processing
Volume number 435-436
Start page 499
End page 503
Publisher Elsevier Sequoia
Place of publication Lausanne, Switzerland
Publication date 2006-11-05
ISSN 0921-5093
1873-4936
Keyword(s) ferrite
EBSD
warm deformation
CDRX
plain low carbon steel
Summary Ferrite grain/subgrain structures evolution during the extended dynamic softening of a plain low carbon steel was investigated throughout the large strain warm deformation by hot torsion. Microstructural analysis with electron back-scattering diffraction (EBSD) scanning electron microscope (FEG/SEM) was carried out on the ferrite microstructural parameters. The results showed that the warm flow stress–strain curves are similar to those affected only by dynamic softening and an extended warm flow softening is seen during large strain deformation up to 30. Furthermore, with an increase in strain up to ~ vert, similar1 the grain size of ferrite, misorientation angle and fraction of high-angle boundaries gradually decrease and fraction of low-angle boundaries increases. With a further increase in the strain beyond ~, vert, similar2, these parameters remain approximately unchanged. No evidence of discontinuous dynamic recrystallisation involving nucleation and growth of new grains was found within ferrite. Therefore, the dynamic softening mechanism observed during large strain ferritic deformation is explained by continuous dynamic recrystallization (CDRX).
Language eng
DOI 10.1016/j.msea.2006.07.026
Field of Research 091499 Resources Engineering and Extractive Metallurgy not elsewhere classified
Socio Economic Objective 970109 Expanding Knowledge in Engineering
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2006, Elsevier B.V
Persistent URL http://hdl.handle.net/10536/DRO/DU:30009086

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