|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Refractory Metals 2018
||Tensile Response of Binary Mo-Si Solid Solution Alloys
||Xiang Yu, Sharvan Kumar
|On-Site Speaker (Planned)
Mo-Si-B alloys are being considered as possible candidates for high-temperature applications beyond the capabilities of Ni-based superalloys. The Mo-rich solid solution phase in these alloys is anticipated to provide low-temperature fracture toughness as well as significantly influence their creep resistance. The solubility of Si in Mo is believed to be ≤ 0.3 wt.% below 1200<SUP>o</SUP>C. In this work, recrystallized Mo-0.2 wt. % Si and Mo-0.3 wt. % Si alloys were tested in uniaxial tension as a function of temperature and strain rate in vacuum and results are compared to previous data on recrystallized CP Mo and a Mo-0.1 wt. % Si alloy. These alloys exhibit serrated flow in the temperature range 700<SUP>o</SUP>C~800<SUP>o</SUP>C at 5×10<SUP>-4</SUP>/s and 700<SUP>o</SUP>C~1000<SUP>o</SUP>C at 5×10<SUP>-6</SUP>/s. Post-deformed microstructures were examined in the TEM and were indicative of more thermally activated cross slip and climb at high temperatures. These results will be presented and implications discussed.
||Planned: Supplemental Proceedings volume