|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Phase Transformations and Microstructural Evolution
||The Microstructural Evolution and Mechanical Behavior of Beta Titanium Alloys Based on Ti-13Cr(wt.%)
||Vahid Khademi, JoAnn Ballor, Carl Boehlert, Masahiko Ikeda
|On-Site Speaker (Planned)
The effects of heat treatment on the mechanical properties, deformation behavior, and phase transformation were studied for low-cost metastable beta titanium alloys based on Ti-13Cr-xFe-xAl (wt.%), where 0<x<3. In-situ and ex-situ tensile tests were performed at temperatures between 25°C to 500°C. Tensile-creep experiments were performed at 410°C and stresses ranging from 125-500 MPa. The effects of heat treatment and thermomechanical loading on the strength and hardness were compared. TEM results indicated that the beta phase transformed to the omega phase during the heat treatments and this was accelerated when an external load was applied. The temperature range of the phase transformation was investigated by dynamic mechanical analysis and the results were compared with the data from differential scanning calorimetry techniques. Both temperature and thermomechanical loading have a significant influence on the deformation mode and phase transformation. The tensile strength can be increased by over fifty percent at elevated temperatures.
||Planned: Supplemental Proceedings volume