|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||High Entropy Alloys VI
||Development of Oxidation Resistant Refractory High Entropy Alloys for High Temperature Applications: Recent Results and Development Strategy
||Bronislava Gorr, Franz Mueller, Hans-Juergen Christ, Hans Chen, Alexander Kauffmann, Dorothée Vinga Szabó, Ruth Schweiger, Martin Heilmaier
|On-Site Speaker (Planned)
Refractory High Entropy Alloys (HEAs) can be considered as promising materials for high temperature applications because of their high melting point and outstanding high temperature strength. The microstructure of the equimolar alloy Nb-Mo-Cr-Ti-Al consists of a disordered body centred cubic (BCC) phase and a small amount of the Laves phase, while the equimolar alloy Ta-Mo-Cr-Ti-Al exhibits the ordered B2 and several Laves phases in addition to the BCC phase. Our experimental studies reveal that these alloys possess a beneficial combination of high temperature strength and corrosion protectiveness. The main drawback of these alloys is their low ductility at room temperature. To improve this alloy property, following strategies will be pursued: (i) the formation of the brittle Laves phase will be suppressed by lowering the Cr concentration and (ii) a sufficiently high ductility at room temperature shall be provided by addition of the potentially ductilizing elements such as Re and Fe.
||Planned: Supplemental Proceedings volume