|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Computational Thermodynamics and Kinetics
||High Temperature Aluminum Alloy Development: Computational Thermodynamics and Kinetics
||Amit Shyam, Dongwon Shin, Shibayan Roy, Lawrence Allard, Yukinori Yamamoto, James Allen Haynes
|On-Site Speaker (Planned)
Steadily increasing U.S. fuel economy standards for vehicles have created an urgent societal demand for cast aluminum alloys with significantly higher temperature (300oC) capacity to enable higher efficiency passenger car engines. For the common precipitation-hardened Al-Cu alloys strengthened by Al2Cu intermetallic precipitates, the upper limit of use is related to the ability to suppress transformation of the 𝜃′ phase to the thermodynamically stable 𝜃 phase. A new approach to substantially increase the thermal stability of 𝜃′ precipitates in Al-Cu alloys will be outlined. Our approach included performing first principles calculations to determine the propensity of microalloying elements to stabilize the critical interfaces in relevant aluminum alloys. A supercell approach was applied within a supercomputing framework and the benefits of a high throughput approach to model interfacial stability will be described. It will be demonstrated that alloys that possess excellent mechanical properties up to 350oC can be developed with this approach.
||Planned: Supplemental Proceedings volume