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Sn、Zr、Mo对Ti35Nb基合金组织与力学性能的影响
发布人：上海艾荔艾金属材料有限公司www.shailiai.com
更新时间：2015-08-19
根据钛合金相关设计理论，采用无细胞毒性的合金元素Nb、Sn、Zr和Mo设计具有低弹性模量的近β型Ti35Nb-Sn-Zr-Mo五元钛合金，研究Sn、Zr和Mo合金元素对合金显微组织与力学性能的影响。
Sn、Zr、Mo对Ti35Nb基合金组织与力学性能的影响Influence of Sn, Zr and Mo elements on microstructure and
mechanical properties of Ti35Nb based alloys
根据钛合金相关设计理论，采用无细胞毒性的合金元素Nb、Sn、Zr和Mo设计具有低弹性模量的近β型Ti35Nb-Sn-Zr-Mo五元钛合金，研究Sn、Zr和Mo合金元素对合金显微组织与力学性能的影响。结果表明：所设计合金在800
℃固溶后的组织均为单一β等轴晶组织；平均晶粒尺寸随着Sn与Zr含量的增加而减小，而随着Mo含量的增加先减小后增大。随着Sn、Zr和Mo合金元素的增加，合金强度随之升高，而伸长率逐渐下降，弹性模量随着Sn和Mo含量的增加而升高，而随着Zr含量的增加先下降后升高。固溶处理后，具有最高容许应变的合金为Ti35Nb2Sn6Zr3Mo，其抗拉强度、屈服强度、弹性模量以及伸长率分别为664
MPa、641 MPa、59 GPa以及12.5%。
Metastable β-type Ti35Nb-based alloys containing
non-toxic elements Nb, Sn, Zr and Mo and with relative low elastic moduli, were
designed based on the relative design theories of titanium alloys. The influence
of Sn, Zr and Mo alloying elements on the microstructure and mechanical
properties of the alloys was investigated. The results show that the designed
alloys are all composed of single β phase after solid solution treatment at 800
℃. The average grain sizes decrease with increasing Sn and Zr contents, while
they decrease first and then increase with increasing Mo content. The strength
of the alloys increases while the elongation decreases with increasing Sn, Zr
and Mo contents. The elastic moduli of the alloys increase with increasing Sn
and Mo contents, while they decrease first and then increase with increasing Zr
content. The ultimate tensile strength, yield strength, elastic modulus and
elongation of the Ti35Nb2Sn6Zr3Mo alloy with the highest allowable strain are
664 MPa, 641 MPa, 59 GPa and 12.5%, respectively.
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