Phase transformations in Ti- 3AI- 8V- 6Cr- 4Zr- 4Mo
Phase transformations in Ti- 3AI- 8V- 6Cr- 4Zr- 4Mo
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DOI：
10.1007/bf02658310
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发表时间：
1979-07
期刊：
影响因子：
--
通讯作者：
T. Headley;H. Rack
中科院分区：
文献类型：
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作者：
T. Headley;H. Rack
采用硬度、x射线测量、光学和透射电子显微镜研究了亚稳β-钛合金Ti-3A1-8V-6Cr-4Zr-4Mo （RMI 38644）的时间-温度转变行为。试验表明，该合金体系中可形成多种亚稳相和稳定相。这些包括亚稳区，ω，汉堡（1型）α和非汉堡（2型）α， TiCr2和ti - zr -硅化物。给出了复合TTT图，描述了时效时间和温度对这些相稳定性的影响。最后，这些转变产物的出现与RMI 38644在高温时效时观察到的硬度变化有关。
The time-temperature-transformation behavior of a metastable β-titanium alloy, Ti-3A1-8V-6Cr-4Zr-4Mo (RMI 38644), has been examined using hardness, X-ray measurements, and optical and transmission electron microscopy. This examination has shown that a variety of metastable and stable phases may form in this alloy system. These include metastable zones, ω, both Burgers (Type 1) α and non-Burgers (Type 2) α, TiCr2, and a Ti-Zr-silicide. A composite TTT diagram is presented which describes the influence of aging time and temperature on the stability of these phases. Finally, the appearance of these transformation products is correlated with the observed hardness changes when RMI 38644 is aged at elevated temperatures.