|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||Refractory Metals 2020
||Development of Refractory Complex Concentrated Alloys RCCAs Using Diffusion Couple Approach
||Vivek Verma, Michael Titus, David Johnson, Kaustubh Kulkarni
|On-Site Speaker (Planned)
Exceptional properties of Refractory High Entropy Alloys (RHEAs) and Refractory Complex Concentrated Alloys (RCCAs) make them promising candidate materials to replace conventional refractory alloys for high temperature applications. However, due to the enormous composition available for these alloys, novel approaches are required for development of specific alloy compositions. Being multicomponent alloys with potential high temperature applications, an in-depth understanding of diffusional interactions is important. As we move from binary to higher order systems, diffusion interactions among alloying elements become significant and in turn affect the interdiffusion behavior of the system. Recent work has shown that diffusional interactions correlate with the enthalpy of mixing, potentially enabling new alloy development strategies by predicting the enhancement or decrease of elemental activities and mobilities. In the present work, a series of AlMoNbTi alloys were fabricated for maximization of Al activities and characterized using the diffusion couple technique. Importance of diffusional interactions will be discussed.
||Planned: Supplemental Proceedings volume