高压时效 β 钛合金的微观组织演化及动力学分析

Microstructure Evolution of β Titanium Alloy During High Pressure Aging

摘要:

本文通过真空熔炼、冷变形、固溶处理制备得到 β 钛合金。利用六面顶压机对 β 钛合金进行高压时效处理，研究高压时效的参数对 β 钛合金显微组织、显微硬度、弹性模量的影响，并对其进行时效动力学分析。研究结果发现：制备得到等轴的 β 钛合金。时效压力、时间对显微组织的影响显著。常压时效析出相很少，高压下析出的 α 相和马氏体相很多。高压时效的压力、时间对显微硬度、弹性模量的影响显著。随着压力的增大，显微硬度先减小后增大，弹性模量增大；随着时间的增大，显微硬度和弹性模量呈先增大后减小趋势。

Abstract:

In this paper, βTitanium alloy was prepared by vacuum melting, cold deformation, and solution treatment. A six-anvil high press was used to perform high-pressure aging treatment on β-Titanium alloy, and the effects of high-pressure aging parameters on the microstructure, microhardness and elastic modulus of βTitanium alloy were studied, and the aging kinetics was analyzed. It is found that, aging pressure and time have significant effects on microstructure, hardness and elastic modulus. With the increase of pressure and time, the precipitation of α phase and martensite phase increases. The pressure and time of high-pressure aging have significant effects on the modulus of microhardness and elasticity. As the pressure increases, the microhardness first decreases and then increases, and the elastic modulus increases; as time increases, Vickers hardness and the elastic modulus first increase and then decrease.