Test Method and Analysis of the Mechanical Properties of Nonlinear Elastic Ti-Nb-Ta-Zr-O Alloys
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摘要: 采用循环加载-卸载的测试方法确定非线性弹性材料Ti-Nb-Ta-O系钛合金的弹性极限和0.2%屈服强度,分别获得了Ti-23Nb-0.7Ta-2Zr-1O、Ti-23Nb-0.7Ta-2Zr-1.2O、Ti-23Nb-0.7Ta-2Zr-0.7O、Ti-25Nb-0.7Ta-2Zr-1.2O四种合金的力学性能参数。通过比较发现,随着合金元素含量的提高,合金的弹性极限、屈服强度和抗拉强度提高,但弹性模量也升高,塑性降低。变形率对提高合金弹性极限有显著的作用,而对屈服强度和抗拉强度影响不大。元素含量提高和变形率增大都使拉伸曲线更加平直化。
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关键词:
- Ti-Nb-Ta-Zr-O合金 /
- 循环加载测试 /
- 弹性极限 /
- 0.2%屈服强度
Abstract: The elastic limit and 0.2% yield strength of nonlinear elastic materials were confirmed by cyclic loading-unloading tensile tests. The mechanical parameters of Ti- 23Nb- 0.7Ta- 2Zr- 1O,Ti-23Nb- 0.7Ta- 2Zr- 1.2O,Ti- 23Nb- 0.7Ta- 2Zr- 0.7O and Ti- 25Nb- 0.7Ta- 2Zr- 1.2O alloys were obtained by using this method. It is found that the elastic limit,yield strength and tensile strength of the alloys increase with the increase in contents of the additional elements. The elastic modulus of the alloys also increases with the plasticity deteriorating as the contents of the additional elements increase. The ratio of deformation has a significant effect on the improvement of elastic limit while slightly affects the yield strength and tensile strength of the alloys. The increase in the contents of elements and the ratio of deformation makes the tensile curve straight.-
Key words:
- Ti-Nb-Ta-Zr-O alloy /
- cyclic loading-unloading test /
- elastic limit /
- 0.2% yield strength
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