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Metastable β-type Ti-30Nb-1Mo-4Sn Alloy with Ultralow Young’s Modulus and High Strength

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Abstract

The effect of thermo-mechanical treatment on the mechanical properties of a novel metastable β-type Ti-30Nb-1Mo-4Sn (wt pct) alloy has been investigated. The solution-treated alloy consists of β and α″ phases and exhibits a two-stage yielding with a low yield stress (around 100 MPa). After cold rolling at a reduction of 87.5 pct and subsequent annealing treat at 623 K (350 °C) for 30 minutes, a fine microstructure with nano-sized α precipitates distributed in small β grains as well as high density of dislocations was obtained to achieve a yield strength of 954 MPa and an ultimate tensile strength of 999 MPa. With low stability of β phase and small volume fraction of α precipitates, the annealed specimen exhibits a low Young’s modulus of 45 GPa. Such an excellent combination of the low elastic modulus and high strength in mechanical properties indicates a great potential candidate for biomedical applications.

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This work was supported by the National Natural Science Foundation of China (No. 51271010 and No. 51221163) and the National 973 Program of China (No. 2012CB619403).

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Authors and Affiliations

  1. School of Materials Science and Engineering, Beihang University, Beijing, 100191, P. R. China

    Liang Hu (Graduate Student), Shun Guo (Ph.D. Student), Qingkun Meng (Ph.D. Student) & Xinqing Zhao (Professor)

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  1. Liang Hu
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  2. Shun Guo
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  3. Qingkun Meng
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  4. Xinqing Zhao
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Correspondence to Xinqing Zhao.

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Manuscript submitted October 3, 2013.

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Hu, L., Guo, S., Meng, Q. et al. Metastable β-type Ti-30Nb-1Mo-4Sn Alloy with Ultralow Young’s Modulus and High Strength. Metall Mater Trans A 45, 547–550 (2014). https://doi.org/10.1007/s11661-013-2134-8

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