In this paper, we report the experimental data of the elastic properties of the Young’s modulus and shear modulus based on the variation in the ultrasonic velocity parameter during the microstructural evolution in a Ti-6Al-4V alloy with two—bimodal and Widmanstätten—varying microstructures. The two different initial microstructures were treated thermally by aging at 515, 545, and 575°C at different times from 1 min to 576 h to induce a precipitation process. Ultrasonic measurements of shear and longitudinal wave velocities, scanning electron microscopy image processing, optical microscopy, and microhardness measurements were performed, establishing a direct correlation with the measurements of the ultrasonic velocity and the elastic properties developed during the thermal treatment by artificial aging. The results of the ultrasonic velocity show a very clear trend as the aging time progresses, which is affected by precipitation of Ti 3 Al particles inside the α phase. In this way, we can find, in a fast and efficient way, the elastic properties developed during the heat treatment by long-term aging, since the presence of these precipitates hardens the material microstructure, thus affecting the final mechanical properties.

中文翻译：

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超声速度测量法测定医用 Ti-6Al-4V ELI 合金老化时的弹性性能

在本文中，我们报告了基于 Ti-6Al-4V 合金在微观结构演变过程中超声速度参数变化的杨氏模量和剪切模量的弹性性能的实验数据，该合金具有两种不同的微观结构——双峰和 Widmanstätten . 通过在 515、545 和 575°C 下在 1 分钟到 576 小时的不同时间对两种不同的初始微观结构进行热处理，以诱导沉淀过程。进行了剪切和纵波速度的超声波测量、扫描电子显微镜图像处理、光学显微镜和显微硬度测量，建立了与超声波速度的测量和人工时效热处理过程中产生的弹性特性的直接相关性。随着时效时间的延长，超声波速度的结果显示出非常明显的趋势，这是受α相内Ti 3 Al颗粒析出的影响。通过这种方式，我们可以快速有效地发现长期时效热处理过程中产生的弹性性能，因为这些析出物的存在使材料微观结构硬化，从而影响最终的机械性能。