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High-temperature deformation characteristics of a β-Type Ti-29Nb-13Ta-4.6Zr alloy

Ghanbari, E, Zarei-Hanzaki, A, Farghadany, E, Abedi, HR and Khoddam, Shahin 2016, High-temperature deformation characteristics of a β-Type Ti-29Nb-13Ta-4.6Zr alloy, Journal of materials engineering and performance, vol. 25, no. 4, pp. 1554-1561, doi: 10.1007/s11665-016-1953-3.

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Title High-temperature deformation characteristics of a β-Type Ti-29Nb-13Ta-4.6Zr alloy
Author(s) Ghanbari, E
Zarei-Hanzaki, A
Farghadany, E
Abedi, HR
Khoddam, ShahinORCID iD for Khoddam, Shahin orcid.org/0000-0002-5205-2086
Journal name Journal of materials engineering and performance
Volume number 25
Issue number 4
Start page 1554
End page 1561
Total pages 8
Publisher Springer Verlag
Place of publication Berlin, Germany
Publication date 2016-04
ISSN 1059-9495
1544-1024
Keyword(s) dynamic recovery
dynamic recrystallization
flow behavior
microstructure
strain rate sensitivity
titanium alloy
science & technology
technology
materials science, multidisciplinary
materials science
shear-band formation
titanium-alloys
hot deformation
mechanical-properties
behavior
strain
evolution
steels
Summary The hot deformation behavior of a biomedical β-type Ti-Nb-Ta-Zr alloy has been studied through applying hot compression tests over a wide range of temperatures and strain rates (600-900 °C and 0.003-0.3 s−1). The main microstructural feature of the specimens, which were deformed at 900 °C, is the pancaked primary grains decorated by the serrated boundaries. The latter may well imply to the occurrence of dynamic recovery. The dynamic recrystallization however is considered as the main restoration mechanism in the specimens, which were deformed at 800 °C under all strain rates. The sizes of the new recrystallized grains well follow the serration amplitude of the primary grain boundaries. At lower deformation temperatures (600 and 700 °C), the strain rate sensitivity is suddenly decreased and ended to the strain localization in the form of macro shear band. The higher accumulated energy within the shear band zones appears to stimulate the occurrence of dynamic recrystallization. To further clarify the high-temperature flow behavior of the experimental alloy, a quantitative approach has been also employed. The observed flow hardening and softening has been justified considering the evolved microstructural features.
Language eng
DOI 10.1007/s11665-016-1953-3
Field of Research 0912 Materials Engineering
Socio Economic Objective 0 Not Applicable
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2016, ASM International
Persistent URL http://hdl.handle.net/10536/DRO/DU:30090335

Document type: Journal Article
Collection: Institute for Frontier Materials
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