Neutron Diffraction Study of Ti–Zr Alloy Microstructure Evolution during Annealing after Severe Plastic Deformation

The evolution of the Ti–Zr alloy microstructure (residual stresses, as well as microstress) during annealing after severe plastic deformation is reported. A strong residual macro-stresses relief starts at temperature of 530–540°C. A steep decrease continues up to 580°C and a further slight decrease...

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Bibliographic Details
Published in:Surface investigation, x-ray, synchrotron and neutron techniques x-ray, synchrotron and neutron techniques, 2020-10, Vol.14 (Suppl 1), p.S225-S230
Main Authors: Strunz, P., Kunčická, L., Kocich, R., Farkas, G., Macháčková, A., Ryukhtin, V.
Format: Article
Language:English
Subjects:
Annealing
Chemistry and Materials Science
Dislocation density
Equal channel angular pressing
Evolution
Heat treatment
Materials Science
Microstrain
Microstructure
Neutron diffraction
Plastic deformation
Process heat
Recrystallization
Residual stress
Surfaces and Interfaces
Thin Films
Titanium base alloys
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Summary:The evolution of the Ti–Zr alloy microstructure (residual stresses, as well as microstress) during annealing after severe plastic deformation is reported. A strong residual macro-stresses relief starts at temperature of 530–540°C. A steep decrease continues up to 580°C and a further slight decrease up to 600°C. Microstrain (caused by the high dislocation density created by equal channel angular pressing) is almost constant up to 300°C, and then begins to decrease gradually due to recovery. The microstrain decrease accelerates at 560°C and is finished at 580°C. Most probably, this is caused by recrystallization. The information obtained is important for possible microstructure modifications and tuning via post-process heat treatment.
ISSN:1027-4510
1819-7094
DOI:10.1134/S1027451020070459