|About this Abstract
||2023 TMS Annual Meeting & Exhibition
||Alloy Behavior and Design Across Length-Scales: An SMD Symposium Honoring Easo George
||Fracture Properties of High-entropy Alloys
||Bernd Gludovatz, Robert O. Ritchie
|On-Site Speaker (Planned)
Since the concept of high-entropy alloys (HEAs) as materials with at least four or five principal elements in (near)-equiatomic composition was introduced in 2004, this new class of materials has penetrated essentially all materials science-related fields. The main reason for this is that some face-centered cubic alloy compositions have been shown to exhibit outstanding mechanical properties with extraordinary combinations of strength, ductility and fracture toughness, particularly at cryogenic temperatures, whereas certain body-centered cubic refractory compositions display outstanding high-temperature strength. While significant effort has been put into rapid screening and narrowing of the compositional space of HEAs to a manageable scope, there are still only a few metallic alloys have been discovered that push the limits of mechanical performance. Here we review work on some of the most damage-tolerant HEAs discovered to date and discuss the fundamental reasons why their resistance to fracture and subsequent stable crack growth is so exceptional.
||High-Entropy Alloys, Mechanical Properties, Characterization