|About this Abstract
||2023 TMS Annual Meeting & Exhibition
||Advances in Titanium Technology
||Investigation of Fine-scaled Alpha Microstructure in Metastable Beta Titanium Alloys
||Deepak V. Pillai, Ahsan Habib Munna, Cameron Tucker, Dian Li, Yufeng Zheng
|On-Site Speaker (Planned)
||Deepak V. Pillai
Due to the combination of great properties such as high strength, low density and great corrosion resistance, metastable beta titanium alloys have been increasingly used as important structural materials in the aerospace industry. The high strength of metastable beta titanium alloys mainly arises from the hcp structured alpha phase precipitates, because the interface between the alpha phase precipitate and the bcc structured beta matrix can act as the barrier for dislocation motion. In this work, the fine-scaled alpha microstructure in two metastable beta titanium alloys, Ti-5Al-5Mo-5V-3Cr-1Zr and TIMETAL18, was quantitatively studied using advanced scanning electron microscopy and the MIPAR image analysis software. It is found that the heating rate before the temperature achieves the isothermal aging temperature plays a critical role in determining the sizescale of alpha precipitate microstructure in these alloys. This work is supported by the NSF CAREER Award, grant DMR-2145844.