Logo image
Back
Evolution of the microstructure and mechanical properties during fabrication of mini-tubes from a biomedical β-titanium alloy
Journal article   Peer reviewed

Evolution of the microstructure and mechanical properties during fabrication of mini-tubes from a biomedical β-titanium alloy

Yaowu Zhang, Damon Kent, Gui Wang, David St John and Matthew Dargusch
Journal of the Mechanical Behavior of Biomedical Materials, Vol.42, pp.207-218
2015
DOI: https://doi.org/10.1016/j.jmbbm.2014.11.013
url
https://doi.org/10.1016/j.jmbbm.2014.11.013View
Published Version

Abstract

Biomedical Engineering Materials Engineering Mechanical Engineering metastable β-titanium alloy cold rolling annealing double yielding martensitic transformation
The processing of Ti-25Nb-3Mo-3Zr-2Sn tubes with outside diameters of 5.6-8.0 mm and wall-thicknesses of 0.7-1.0 mm were investigated in order to study the evolution of microstructure and mechanical properties and their impact on the processing of the tubes. The annealed small tubes with single β phase microstructures exhibit double yielding during tensile tests. The onset of martensitic phase transformation was observed to occur after the lowest point of the strain hardening. Cold rolling also activates the formation of the stress induced martensitic α″ phase. Its volume fraction increased with increasing ε. The rate of strain hardening and the modulus of the tubes are related to the stress induced transformation of the β phase to the α″ phase. The stress induced α″ slightly improves the yield strength of the tubes at low levels of strain. However, larger strains result in grain growth during annealing, which diminishes the mechanical properties.

Details

Metrics

8 File views/ downloads
1013 Record Views
16 Times Cited - Web of Science

InCites Highlights

These are selected metrics from InCites Benchmarking & Analytics tool, related to this output

Web Of Science research areas
Engineering, Biomedical
Materials Science, Biomaterials
Logo image