Abstract The solution-aging treatment parameters, including solution temperature, cooling rate and aging temperature, have significant influences on the microstructures and comprehensive mechanical properties of titanium alloy. In this work, the detailed microevolution behaviors of Ti–10V–2Fe–3Al alloy under different solution and aging conditions have been investigated through a series of heat-treatment experiments. The results of solution-treatment experiments reveal that the content of αp-phase is reduced to zero as the solution temperature is raised to a certain α → β critical transformation point. Recrystallized β-grains can be observed at the solution temperature of 820°C. In addition, the cooling way (air cooling or water cooling) has little influence on the microevolution behaviors for this alloy during the solution-treatment process. As for the solution-aging-treatment experiments, the results reveal that αs-phases are precipitated from the supersaturated β-phase, and the fraction of αs-phase increases with increasing aging temperature. However, the precipitated α-grains intend to coalesce and coarsen as the aging temperature raises above 510°C. Therefore, the advocated solution-aging-treatment program is solution treatment at 820°C with air cooling followed by aging treatment at 510°C with air cooling.

中文翻译：

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固溶和时效处理参数对Ti-10V-2Fe-3Al合金组织演变的影响

摘要 固溶温度、冷却速度和时效温度等固溶时效处理参数对钛合金的显微组织和综合力学性能有显着影响。在这项工作中，通过一系列热处理实验研究了 Ti-10V-2Fe-3Al 合金在不同固溶和时效条件下的详细微演化行为。固溶处理实验结果表明，随着固溶温度升高到一定的α→β临界转变点，αp相的含量减少到零。在 820°C 的溶液温度下可以观察到重结晶的 β 晶粒。此外，冷却方式（空冷或水冷）对该合金在固溶处理过程中的微观演化行为影响不大。对于固溶-时效处理实验，结果表明αs-相从过饱和β-相中析出，并且αs-相的比例随着时效温度的升高而增加。然而，随着时效温度升高到 510°C 以上，析出的 α 晶粒会聚结和变粗。因此，提倡的固溶-时效处理程序是在820℃空冷固溶处理，然后在510℃空冷时效处理。