|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||High Entropy Alloys VI
||Insight into High-temperature Oxidation of Refractory High-entropy Alloys and Mechanical Properties
||Saad Sheikh, Sheng Guo
|On-Site Speaker (Planned)
There is a constant need for new high-temperature materials based on metals with higher operating temperatures. Refractory High-Entropy alloys (RHEAs) containing refractory elements can be possible candidates but it is widely known that refractory elements oxidize rapidly in air at high-temperature which can lead to hardening and embrittlement by dissolution of oxygen. Therefore, one of the main challenge in utilizing RHEAs as structural materials is their lack of oxidation resistance in combination with ductility at both room and high-temperature. Recently, there are some guidelines to tune the room temperature ductility of RHEAs using the valence electron concentration, but the oxidation resistance of RHEAs have not been sincerely studied. Deriving from conventional refractory alloys, the oxidation resistance of RHEAs shall get improved by doping with elements such as Aluminum and Chromium. Our findings will shed light on the design of RHEAs with optimal mechanical properties in combination with high-temperature oxidation resistance.
||Planned: Supplemental Proceedings volume