An investigation of the mechanical behaviour of fine tubes fabricated from a Ti-25Nb-3Mo-3Zr-2Sn alloy

Zhang, Yaowu, Kent, Damon, Wang, Gui, St John, David and Dargusch, Matthew (2015) An investigation of the mechanical behaviour of fine tubes fabricated from a Ti-25Nb-3Mo-3Zr-2Sn alloy. Materials and Design, 85 256-265. doi:10.1016/j.matdes.2015.06.127

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Author Zhang, Yaowu
Kent, Damon
Wang, Gui
St John, David
Dargusch, Matthew
Title An investigation of the mechanical behaviour of fine tubes fabricated from a Ti-25Nb-3Mo-3Zr-2Sn alloy
Journal name Materials and Design   Check publisher's open access policy
ISSN 1873-4197
0264-1275
Publication date 2015-11-15
Year available 2015
Sub-type Article (original research)
DOI 10.1016/j.matdes.2015.06.127
Open Access Status File (Author Post-print)
Volume 85
Start page 256
End page 265
Total pages 10
Place of publication London, United Kingdom
Publisher Elsevier
Collection year 2016
Language eng
Abstract This study investigates the mechanical properties and the deformation mechanisms active in Ti–25Nb–3Mo–3Zr–2Sn fine tubes. Ti–25Nb–3Mo–3Zr–2Sn alloy is a recently developed metastable β titanium alloy intended for biomedical applications. Tensile tests were carried out on the fine tubes. The modulus of the Ti–25Nb–3Mo–3Zr–2Sn fine tubes increased with reductions in the diameter for tubes in the cold rolled and annealed conditions. In comparison with cold rolled tubes, the annealed tubes exhibit increased strain hardening behaviour and superior ductility. Mechanical twins, stress-induced martensitic transformation and the textures of the β and α″ phases were investigated. The results show that the fine tubes exhibit different moduli which are related to the evolution of β and α″ phase textures during processing. Cold rolling facilitates the transformation from β to the α″ phase and mechanical {332}〈113〉 twinning. For the annealed tubes, mechanical twinning as well as primary and secondary martensitic transformations was activated at specific levels of tensile strain. Twins developed with increasing levels of strain, and secondary martensitic transformations occurred within the twinned β regions. Annealed fine tubes exhibit multistage strain hardening behaviour and superior ductility due to the synergetic effects of twinning induced plasticity and transformation induced plasticity during tensile deformation.
Keyword Metastable β-titanium alloy
Fine tube
Mechanical properties
Twinning
Martensitic transformation
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mechanical & Mining Engineering Publications
Official 2016 Collection
 
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Citation counts: TR Web of Science Citation Count  Cited 3 times in Thomson Reuters Web of Science Article | Citations
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