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Effect of Sn additions on the microstructure, mechanical properties, corrosion and bioactivity behaviour of biomedical Ti–Ta shape memory alloys

Ibrahim, Mustafa K. and N. Saud, E. Hamzah Safaa and Nazim, E. M. and Iqbal, N. and Bahador, A. (2018) Effect of Sn additions on the microstructure, mechanical properties, corrosion and bioactivity behaviour of biomedical Ti–Ta shape memory alloys. Journal of Thermal Analysis and Calorimetry, 131 (2). pp. 1165-1175. ISSN 1388-6150

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Official URL: http://dx.doi.org/10.1007/s10973-017-6636-2

Abstract

Ti–Ta and Ti–Ta–xSn shape memory alloys (SMAs) were produced successfully by microwave sintering. Tin element was added to Ti–Ta SMA with three different atomic percentages (0.37, 0.745 and 2.26 at.%). The influences of Sn addition on microstructure, transformation temperatures, mechanical properties, shape memory behaviours, corrosion resistance and bioactivity were investigated. It was found that the morphologies of the modified and unmodified Ti–Ta alloys contain a plate-like and needle-like structure, where the former structure is related to the β phase and the latter related to the α phase. The transformation temperatures of Ms to Mf with and without Sn additions were observed to be in the range of 389.65 to 355 K, while the transformation temperatures of As to Af were found to be in the range of 250.42 to 365.8 K. By increasing the proportion of Sn, the compressive fracture strength and shape memory behaviour were enhanced; however, the corrosion resistance tended to be decreased. Based on the bioactivity results, antibacterial activity was improved with the addition of Sn. In conclusion, the existent results indicate that Ti–30 at.% Ta SMAs may be a convenient alternative to Ni–Ti for certain biomedical applications.

Item Type:Article
Uncontrolled Keywords:Bioactivity, Microstructure
Subjects:T Technology > TJ Mechanical engineering and machinery
Divisions:Mechanical Engineering
ID Code:86323
Deposited By: Widya Wahid
Deposited On:31 Aug 2020 13:59
Last Modified:31 Aug 2020 13:59

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