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Erschienen in: Metallurgical and Materials Transactions A 6/2021

28.03.2021 | Original Research Article

Evolution of Texture and Deformation Mechanisms During Repeated Deformation and Heat Treating Cycles of U-6Nb

verfasst von: Donald W. Brown, Kester D. Clarke, Bjorn Clausen, Catherine N. Tupper, Sven Vogel, Eloisa Zepeda-Alarcon

Erschienen in: Metallurgical and Materials Transactions A | Ausgabe 6/2021

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Abstract

The evolution of the crystallographic texture and lattice strain of uranium 6-weight percent niobium alloy samples are tracked during multiple deformation and heat treating cycles in an effort to understand and control the mechanical properties of the material following thermo-mechanical processing. The heavily twinned microstructure and low-symmetry crystal structure of U-6Nb result in multiple sequential active deformation mechanisms associated with distinctive deformation textures in strain ranges from 0-0.15 true strain. It is found that heating into the high-temperature γ-phase erases much of the texture formed during deformation at room temperature in the α′′-phase and resets the active deformation mechanisms. Through a small number of deformation/heat treat cycles to moderate strains, i.e., ~ 0.13 per cycle, the flow strength of the material is recovered to its original value. However, on the fourth such cycle, a reduction of strength is observed and the sample failed.

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Metadaten
Titel
Evolution of Texture and Deformation Mechanisms During Repeated Deformation and Heat Treating Cycles of U-6Nb
verfasst von
Donald W. Brown
Kester D. Clarke
Bjorn Clausen
Catherine N. Tupper
Sven Vogel
Eloisa Zepeda-Alarcon
Publikationsdatum
28.03.2021
Verlag
Springer US
Erschienen in
Metallurgical and Materials Transactions A / Ausgabe 6/2021
Print ISSN: 1073-5623
Elektronische ISSN: 1543-1940
DOI
https://doi.org/10.1007/s11661-021-06210-y

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