时效温度对Ti-6Al-2Mo-1.5Cr-2Sn-2Zr-1V-0.4Fe-0.15Si合金显微组织的影响
Effect of Aging Temperature on Microstructure of Ti-6Al-2Mo-1.5Cr-2Sn-2Zr-1V-0.4Fe-0.15Si Alloy
宋 淼, 马英杰, 刘羽寅, 雷家峰
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作者单位：(中国科学院金属研究所 钛合金研究部, 辽宁 沈阳 110016)
中文关键字：钛合金； 时效处理； 显微组织； 透射电镜
英文关键字：titanium alloy; aging treatment; microstructure; transmission electron microscopy
中文摘要：采用金相显微镜、X射线衍射(XRD)和透射电子衍射(TEM)等方法研究了时效温度对一种(α + β)两相钛合金显微组织的影响。结果表明：时效温度对合金中初生α相形貌的影响较小，但α稳定元素Al和β稳定元素Mo、Cr等在初生α中的变化呈相反规律；随时效温度的升高，合金中β相的晶格常数逐渐变大，并且次生α相的尺寸呈现一定的粗化，但次生α相的体积分数变化较小。TEM研究显示，次生α相与β相符合经典的取向关系。
英文摘要：The effects of aging temperature on microstructure of Ti-6Al-2Mo-1.5Cr-2Sn-2Zr-1V-0.4Fe-0.15Si alloy were investigated by metallographic microscope, XRD and TEM methods. The results show that the aging temperature has little effect on the morphology of α phase, while the α stabilizer element Al has an opposite change pattern with the typical β stabilizer elements Mo and Cr; the lattice parameter of β phase increases with the increase of aging temperature; the secondary α coarsens slightly, but the volume fraction of the secondary α remains stable. The orientation relationship between the secondary α and β phase accords with the classical relationship.