【摘 要】
：
研究Mo作为β相稳定元素,对Ti-Mo-Sn合金相组成、显微组织、力学性能和形状记忆性能的影响.通过电弧熔炼法制备不同成分的Ti-xMo-3Sn(x=2,4,6,摩尔分数,％)合金,并制备二元合金
【机 构】
：
Department of Material Science & Engineering,Institute of Space Technology,Near Rawat Toll Plaza,Isl
论文部分内容阅读
研究Mo作为β相稳定元素,对Ti-Mo-Sn合金相组成、显微组织、力学性能和形状记忆性能的影响.通过电弧熔炼法制备不同成分的Ti-xMo-3Sn(x=2,4,6,摩尔分数,％)合金,并制备二元合金 Ti-6Mo作为对照组.Ti-xMo-3Sn合金具有硬度低和韧性高(厚度可减少90％)的特点,而Ti-6Mo合金则表现出脆性行为,硬度高、韧性差.场发射扫描电镜(FESEM)下发现圆形的无热ω(ωath)析出相.X射线衍射结果也证实铸态和固溶处理-淬火态的样品中均存在ωath 相.光学显微镜和FESEM结果显示,由于发生β→ω相变,淬火过程中形成的马氏体数量随着Mo含量的增加而降低.硬度的变化趋势也证实ωath相的存.Ti-6Mo-3Sn合金的形状记忆效应(SME)最高,为9％.合金SME较低是由于形成ωath 相;然而,SME随着Mo含量的增加而增加,这是由于ωath相的逆相变和由压力引起的马氏体相变所致.另外,设计一种新的、非常简单的测量形状记忆效应的方法.
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