|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Advances in Multi-Principal Elements Alloys X
||Do we need a refractory alloy with super-high strength at room temperature?
||Oleg N. Senkov, Daniel B. Miracle
|On-Site Speaker (Planned)
||Oleg N. Senkov
Refractory complex concentrated alloys (RCCAs) attract much attention as potential candidates for high-temperature (HT) structural applications. The number of publications on RCCAs is growing rapidly and many new RCCAs have been developed recently. Often only room temperature (RT) properties are reported, with the goal of developing RCCAs with high RT strength. However, RCCAs are intended for HT applications, and our analysis shows no direct correlation between RT and HT strengths. Many RCCAs with RT strength > 1200 MPa have poor RT ductility and lose their strength rapidly above ~ 800-1000°C. RCCAs that are ductile at RT and strong at HT, generally have RT yield strength ≤ 1200 MPa and relatively weak temperature dependence of the yield strength. It is concluded from this analysis that refractory alloys intended for HT structural applications do not need to have super-high strength at RT. Details of this analysis will be provided in the presentation.
||High-Entropy Alloys, High-Temperature Materials, Mechanical Properties