|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||High Entropy Alloys V
||On the Damage Tolerance of the High-entropy Alloy CrMnFeCoNi in the Range Room Temperature to Liquid Nitrogen Temperatures
||Bernd Gludovatz, Keli V S Thurston, Anton Hohenwarter, Guillaume Laplanche, Easo P George, Robert O Ritchie
|On-Site Speaker (Planned)
(Near-)equiatomic multi-component alloys are an intriguing new class of materials that can crystallize as single-phase solid solutions with simple crystal structures despite containing high concentrations of elements with very different crystal structures which makes them in-teresting from a fundamental scientific viewpoint. Additionally, they can display a good combination of mechanical properties making them attractive for a wide range of applica-tions. Here we examine the high-entropy alloy CrMnFeCoNi which exhibits an excellent combination of strength, ductility and fracture toughness at ambient to cryogenic tempera-tures, consistent with its deformation modes of planar dislocation slip and deformation-induced nano-twinning. We will show our work on specifically designed ‘hourglass-shaped’ samples containing gradients in cross-section to determine the stresses required for the onset of twinning in order to shed light on the micro-scale mechanisms underlying the excellent mechanical properties of these materials and will report results of the material’s fatigue-crack propagation behavior at RT and below.
||Planned: Supplemental Proceedings volume