热-机械处理对亚稳β钛合金微观组织和力学性能的影响
发布时间：2019-03-25 20:23
【摘要】：采用X射线衍射、透射电镜和力学性能测试等手段,系统研究了热-机械处理对亚稳βTi-25Nb-2Mo-4Sn合金微观组织和力学性能的影响。结果表明:由于合金中β稳定化元素含量不足,固溶处理后的合金中含有大量的α"马氏体,合金呈现低屈服强度。经过相同的时效处理(400℃/2 h),固溶态和冷轧态样品的相组成分别为β+ω和β+α相。冷变形引入的大量位错和晶界可有效抑制时效过程中ω相的形成,并促进α相的析出。冷轧态样品经475℃时效15 min后弹性模量为65 GPa,屈服强度和抗拉强度分别为1033和1113 MPa,实现了低模量和高强度的良好匹配。
[Abstract]:The effect of thermal-mechanical treatment on microstructure and mechanical properties of metastable 尾-Ti-25Nb-2Mo-4Sn alloy was systematically studied by means of X-ray diffraction, transmission electron microscopy and mechanical properties test. The results show that there is a large amount of 伪 "martensite in the alloy after solution treatment due to the insufficient content of 尾 stabilizing elements in the alloy, and the alloy exhibits low yield strength. After the same aging treatment (400 鈩，
本文编号：2447282
[Abstract]:The effect of thermal-mechanical treatment on microstructure and mechanical properties of metastable 尾-Ti-25Nb-2Mo-4Sn alloy was systematically studied by means of X-ray diffraction, transmission electron microscopy and mechanical properties test. The results show that there is a large amount of 伪 "martensite in the alloy after solution treatment due to the insufficient content of 尾 stabilizing elements in the alloy, and the alloy exhibits low yield strength. After the same aging treatment (400 鈩，
本文编号：2447282
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