Evolution mechanism of grain orientation and texture distribution of Ti-6.5Al-3.5Mo-1.5Zr-0.3Si alloy under electroshocking treatment
Jianzhong Zhou, Chang Liu, Yaya Wu, Lechun Xie, Fei Yin, Dongsheng Qian, Yanli Song, Liqiang Wang, Lai‐Chang Zhang, Lin Hua
Abstract
It is well known that the mechanical properties of Ti-6.5Al-3.5Mo-1.5Zr-0.3Si are closely related to its microstructure and texture. In this work, a novel treatment of electroshocking treatment (EST) was adopted to optimize the microstructure and improve the mechanical properties of this titanium alloy. The grain orientation, texture, and mechanical properties of Ti-6.5Al-3.5Mo-1.5Zr-0.3Si alloy under EST were characterized and analyzed. With the increase of EST time to 0.04 s, the resultant acicular secondary αs shows a tendency of spheroidization and the increase in grain diameter, which leads to a little decrease in hardness and yield strength. The increase in EST time to 0.06 s resulted in the precipitation of martensitic phases with high aspect ratios and a reduction in grain size in Ti-6.5Al-3.5Mo-1.5Zr-0.3Si alloy, as well as generating a more uniform texture distribution. The optimization of microstructure and texture significantly enhances the hardness and yield strength. The results in this work demonstrate that EST can serve as a novel method to regulate the microstructure and mechanical properties of Ti-6.5Al-3.5Mo-1.5Zr-0.3Si alloy.