|About this Abstract
||1st World Congress on High Entropy Alloys (HEA 2019)
||High Entropy Alloys 2019
||Understanding the Microstructure of Refractory Metal High Entropy Superalloys
||Tamsin Whitfield, Ed J Pickering, Howard J Stone, Colin N. Jones, Nick G Jones
|On-Site Speaker (Planned)
Refractory Metal High Entropy Superalloys (RMHES) have been proposed as potential successors for Ni-based superalloys in ultra-high temperature applications. These alloys have microstructures containing crystallographically related ordered and disordered phases, good high temperature compressive yield strengths and competitive densities. However, further development of these materials requires a more complete understanding of their underlying metallurgy, in particular the evolution of their microstructure. Understanding the microstructural development of these materials is particularly challenging due to their inherent compositional complexity and relatively little is currently known about the influence of compositional modifications. Here we report on the influence that systematic compositional variations have on the microstructural evolution and phase equilibria of simplified ternary and quaternary RMHES systems. The results provide a knowledge base that will underpin the development of more complex RMHES in the future.