Cu元素对TiNiNb合金阻尼性能的影响

The Effect of The Cu Element on the TiNiNb Alloy Damping Performance

采用差示扫描量热仪(DSC)研究了不同原子百分比含量Cu元素(5%,15%,25%)取代Ni对TiNiNb合金马氏体相变温度的影响,并利用单悬臂法(动态机械分析仪)测试了这3种合金的阻尼性能。结果表明,Cu元素对TiNiNb合金相变过程没有明显的影响,在试验温度范围内,合金经历了一阶段的热弹性马氏体相变;Cu含量的增多促进了该合金相变温度的增加,使得相变主要发生在80℃～98℃之间(加热过程);在马氏体相区,Cu含量高,材料的阻尼性能越好。

The influence of substitution of the different abundance Cu element （5%, 15%, 25%） for Ni in TiNiNb alloy on the martensitic transformation temperature was studied by DSC, and the damping performance was tested by dynamic mechanics analyzer. The results show that Cu have no obvious influence on the process of transformation, at the tested temperature, the thermo-elastic martensitic transformation was taken place in the alloy; The increase of Cu abundance results in the increase of the transformation temperature, as a result, the most transformation occurs at 88-98 ℃; In the martensite phase zone, the higher the Cu abundance, the better the damping performance is.