Abstract
Ti–26Nb–2Fe–(0, 2, 4, 6, 8)Sn alloys were prepared by arc melting and subjected to homogenization, cold rolling, and solution treatment. The β phase stability of the alloys increased with the addition of Sn. Ti–26Nb–2Fe comprised ω + β phases, whereas a single β phase was detected in Ti–26Nb–2Fe–(2, 4, 6, 8)Sn. With an increase in Sn, the Young’s modulus first decreased from 83 GPa in Ti–26Nb–2Fe to 58 GPa in Ti–26Nb–2Fe–4Sn and increased to 63 GPa in Ti–26Nb–2Fe–8Sn. Sn suppressed twinning during tension. Although the work-hardening rate decreased with the decrease of twinning, Sn was beneficial for maintaining a low work-hardening rate and postponed necking. All the alloys exhibited remarkably high plasticity. A strong solid solution strengthening effect of Sn was not observed in the studied Ti–Nb–Fe–Sn alloys. Ti–26Nb–2Fe–4Sn with a good combination of high tensile strength (yield strength of 592 MPa and tensile strength of 622 MPa) and low Young’s modulus (58 GPa) exhibited significantly higher cell viability than that of the control group after a 7-day culturing, indicating that it is a suitable candidate for biomaterials.
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Acknowledgements
This work was partially supported by the Natural Science Foundation of Shanghai, China (No. 15ZR1428400), Shanghai Engineering Research Center of High-Performance Medical Device Materials (No. 20DZ2255500), the project of Creation of Life Innovation Materials for Interdisciplinary and International Researcher Development, Tohoku University, Japan sponsored by Ministry, Education, Culture, Sports, Science and Technology, Japan, and the Grant-in Aid for Scientific Research (C) (No. 20K05139) from JSPS (Japan Society for the Promotion of Science), Tokyo, Japan.
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QL: Investigation, Writing—original draft, Writing—review and editing, Funding acquisition. TL: Resources, Writing—original draft. JL: Investigation. CC: Resources. MN: Supervision, Funding acquisition. KY: Investigation. AC: Investigation, Supervision. TN: Supervision, Funding acquisition.
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Li, Q., Liu, T., Li, J. et al. Microstructure, mechanical properties, and cytotoxicity of low Young’s modulus Ti–Nb–Fe–Sn alloys. J Mater Sci 57, 5634–5644 (2022). https://doi.org/10.1007/s10853-022-06984-5
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DOI: https://doi.org/10.1007/s10853-022-06984-5