AUTHOR=Ma Fengcang , Zhang Gaojie , Liu Ping , Chen Juan , Liu Xinkuan , Li Wei TITLE=Effect of Various Annealing Temperature on Microstructure and Properties of Metastable β-Type Ti-35Nb-2Ta-3Zr Alloy for Biomedical Applications JOURNAL=Frontiers in Materials VOLUME=7 YEAR=2020 URL=https://www.frontiersin.org/journals/materials/articles/10.3389/fmats.2020.00077 DOI=10.3389/fmats.2020.00077 ISSN=2296-8016 ABSTRACT=

Microstructure and properties of a metastable β-type Ti-35Nb-2Ta-3Zr alloy after cold rolling plus annealing at various temperatures were investigated systematically. The X-ray diffraction results show that the sample annealed at 923 K is mainly composed of the β phase (92.3%). However, the samples annealed at 723, 823, and 1023 K contain a large amount of α″ phase of 39.6, 36.5, and 39.4%, respectively. The elastic modulus of the sample annealed at 923 K is about 50.1 GPa. However, these of the samples annealed at 723, 823, and 1023 K are 73.7, 56.1, and 70.2 GPa. Furthermore, the sample annealed at 923 K presents the best elasticity and the highest recovery strain (∼66.87%). The corrosion rate of the sample annealed at 923 K (∼2.403 μm⋅a–1) is the lowest among all the samples, which may be attributed to its minimum content of α″ phase.