Microstructure and Final Properties of Cold-Rolled Ti-32.5Nb-6.8Zr-2.7Sn-0.3O Biomedical β Titanium Alloy

Chun Bo Lan; Li Li Guo; Feng Chen

doi:10.4028/www.scientific.net/MSF.886.59

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Microstructure and Final Properties of Cold-Rolled Ti-32.5Nb-6.8Zr-2.7Sn-0.3O Biomedical β Titanium Alloy
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HomeMaterials Science ForumMaterials Science Forum Vol. 886Microstructure and Final Properties of Cold-Rolled...

Microstructure and Final Properties of Cold-Rolled Ti-32.5Nb-6.8Zr-2.7Sn-0.3O Biomedical β Titanium Alloy

Abstract:

Ti-32.5Nb-6.8Zr-2.7Sn-0.3O (TNZSO, wt%) alloy was melted under a high-purity argon atmosphere in an electric arc furnace, followed by cold-rolling. The effects of rolling process on microstructures and final properties were investigated using OM, XRD, TEM, TMA and universal material testing machine. Results show that no stress-induced α" martensite transformation occurred after cold-rolling. The plastic deformation mechanisms of the alloy were related to {112}〈111〉 type deformation twins and dislocation slip. With the increase of cold deformation reductions, the elastic modulus slightly decreased owing to the increase of dislocation density. The 90% cold deformed sample exhibited a great potential to become a new candidate for biomedical applications since it possesses low elastic modulus (55.3 GPa) and high tensile strength (1093 MPa), which are superior than those of Ti-6Al-4V alloy. The coefficient of thermal expansion was also low (~6×10^-6°C^-1 between 25 and 320°C) in the 90% CR alloy.

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Periodical:

Materials Science Forum (Volume 886)

Pages:

59-63

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.886.59

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Online since:

March 2017

Authors:

Chun Bo Lan*, Li Li Guo, Feng Chen

Keywords:

Biomedical Applications, Cold-Rolled, Final Properties, Microstructure, Ti-32.5Nb-6.8Zr-2.7Sn-0.3O Alloy

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