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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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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Palmiere, E.J.
description 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.
doi_str_mv 10.1016/j.scriptamat.2010.10.004
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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
title The effect of strain path reversal on high-angle boundary formation by grain subdivision in a model austenitic steel
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