Effect of solution heat treatment on the stress-indcued martensite transformation in two new titanium alloys
Effect of solution heat treatment on the stress-indcued martensite transformation in two new titanium alloys
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固溶热处理对两种新型钛合金应力诱发马氏体相变的影响
DOI：
10.1016/j.jallcom.2015.04.070
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发表时间：
2015
影响因子：
6.2
通讯作者：
Jianghua Chen
中科院分区：
文献类型：
--
作者：
Cong Li;Jian Chen;Yanjie Ren;Wei Li;Jianjun He;Jianghua Chen
Ti-10 V-2Cr-3Al和Ti-10 V-1Fe-3Al合金是在Ti-10 V-2Fe-3Al合金的基础上设计的应力诱发马氏体（SIM）相变两相钛合金。通过显微组织观察和力学性能测试，研究了固溶热处理对这两种合金SIM转变的影响。结果表明，经β、α + β和β +（α + β）固溶处理后，大部分样品都具有高度亚稳的β相结构。在压缩载荷下，β相转变为马氏体。引发β → α″相变的应力对固溶时间非常稳定。预先存在的热马氏体对SIM转变有阻碍作用。在β +（α + β）固溶条件下，调节α相的体积分数导致足够稳定的β相，使得在变形下不形成马氏体并且仅激活滑移。固溶温度对触发应力的影响比固溶时间的影响更大。
Ti–10V–2Cr–3Al and Ti–10V–1Fe–3Al alloys are newly designed two phase titanium alloy for stress-induced martensite (SIM) transformation on the basis of Ti–10V–2Fe–3Al alloy. The effect of solution heat treatment on the SIM transformation in these two alloys was studied through microstructural observation and mechanical property test. The results show that, after β, α + β and β + (α + β) solution treatments, most of the samples contain a highly metastable β microstructure. Under compression loading, the β phase transform to a martensite. The stress at which β to α″ transformation is triggered is very stable to the solution time. The pre-existing thermal martensite has an obstructive effect on SIM transformation. In β + (α + β) solution conditions, tuning the volume fraction of the α phase leads to a sufficiently stable β phase so that no martensite is formed under deformation and only slip is activated. Moreover, the effect of solution temperature on triggering stress is more intense compared with that of solution time.