Recrystallization Behavior in Ti-13Cr-1Fe-3Al Alloy after Severe Plastic Deformation

Ti-13Cr-1Fe-3Al alloy was developed as an affordable priced titaniumbased material for general use. Up to now, we've investigated mechanical properties, microstructures and heat treatment behaviors in the alloy. The grain size was refined to around 20 mu m by thermo-mechanical treatments, dispe...

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Bibliographic Details
Published in:AIP conference proceedings 2012-03
Main Authors: Ueda, Masato, Matsuhira, Hikaru, Takasaki, Yuji, Ikeda, Masahiko, Todaka, Yoshikazu
Format: Article
Language:English
Subjects:
Alloy development
Diamond pyramid hardness
Dispersions
Grain size
Microstructure
Plastic deformation
Recrystallization
Titanium base alloys
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Summary:Ti-13Cr-1Fe-3Al alloy was developed as an affordable priced titaniumbased material for general use. Up to now, we've investigated mechanical properties, microstructures and heat treatment behaviors in the alloy. The grain size was refined to around 20 mu m by thermo-mechanical treatments, dispersions of titanium boride or yttrium oxide, and so on. This means the grain size reaches the limit of conventional techniques in this alloy. Severe plastic deformation (SPD) has received considerable attention as a useful procedure for significant refinement of microstructures in metallic materials. In this study, recrystallization behavior was investigated in the Ti-13Cr-1Fe-3Al alloy after high-pressure torsion (HPT), which is an SPD procedure. Vickers hardness rapidly increased with the number of turns (N) and saturated around 440 after N=5. The HPT-processed specimen for N=10 was fully recrystallized at 1023 K for 0.3 ks. Equiaxed crystals could be observed and the size reached 6 mu m.
ISSN:0094-243X