|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||High Entropy Alloys IV
||Precipitation Kinetics in High Entropy Alloy Al0.5CrFeCoNiCu
||Nicholas G Jones, Kathy Christofidou, Edward Pickering, Roberto Izzo, Howard Stone
|On-Site Speaker (Planned)
||Nicholas G Jones
Previous work has established that Al0.5CrFeCoNiCu forms multiple intermetallic phases when exposed to elevated temperatures for long durations. However, the speed at which these precipitation reactions occur remains unknown. Diffusion in High Entropy Alloys is generally thought to be sluggish and it has been suggested that in Al0.5CrFeCoNiCu the kinetics are sufficiently slow that no microstructural evolution occurs when furnace cooling from elevated heat treatment temperatures. However, other reports challenge this claim and show evidence of precipitation when cooling at rates approaching 1˚Cs-1 from the liquid state. Here we report on the evolution of the microstructure of Al0.5CrFeCoNiCu as a function of time following exposure to temperatures between 700 and 1000˚C and use this data to discuss the precipitation kinetics of this alloy.
This work was supported by Rolls-Royce plc and EPSRC under EP/H022309/1, EP/H500375/1 & EP/M005607/1.
||Planned: A print-only volume