The effect of strain path reversal on high-angle boundary formation by grain subdivision in a model austenitic steel

The effects of large strain and strain path reversal on deformation microstructure development in austenite below recrystallization temperature were studied by hot torsion using an Fe-30 wt.% Ni model alloy. Results show that high-angle boundaries (HABs) can be generated by both dislocation accumula...

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Bibliographic Details
Published in:Scripta materialia 2011-02, Vol.64 (3), p.280-283
Main Authors: Sun, L., Muszka, K., Wynne, B.P., Palmiere, E.J.
Format: Article
Language:English
Subjects:
Alloy development
Austenite
Austenitic stainless steels
Boundaries
Dislocation boundaries
Electron backscattering diffraction (EBSD)
Ferrous alloys
Grains
Hot working
Nickel base alloys
Steels
Strain
Strain path
Subdivisions
Torsion
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Summary:The effects of large strain and strain path reversal on deformation microstructure development in austenite below recrystallization temperature were studied by hot torsion using an Fe-30 wt.% Ni model alloy. Results show that high-angle boundaries (HABs) can be generated by both dislocation accumulation and subgrain rotation. Multiple strain reversals lead to less well-developed HABs in the original grains compared to single reversal deformed to the same strain. This is attributed to subgrain rotation mechanism being less effective at small strains.
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2010.10.004