Strength can be controlled by edge dislocations in refractory high-entropy alloys

• Published in: Nature communications Vol. 12; no. 1; p. 5474
• Main Authors: Lee, Chanho, Maresca, Francesco, Feng, Rui, Chou, Yi, Ungar, T., Widom, Michael, An, Ke, Poplawsky, Jonathan D., Chou, Yi-Chia, Liaw, Peter K., Curtin, W. A.
• Format: Journal Article
• Language: English
• Published: London Nature Publishing Group UK 16.09.2021; Nature Publishing Group; Nature Portfolio
• Subjects: 147/135; 147/143; 639/166/988; 639/301/1023/303; 639/301/1034/1037; Alloys; BCC metals; Body temperature; Chromium; Computational methods; Dislocation mobility; Edge dislocations; Electron microscopes; Energy efficiency; Entropy; High entropy alloys; High resolution electron microscopy; High strength alloys; High temperature; Humanities and Social Sciences; MATERIALS SCIENCE; Mechanical engineering; Mechanical properties; Metals; Molybdenum; multidisciplinary; Niobium; Plastic flow; Science; Science (multidisciplinary); Screw dislocations; Titanium; Transmission electron microscopy; Tungsten; Zirconium

Energy efficiency is motivating the search for new high-temperature (high-T) metals. Some new body-centered-cubic (BCC) random multicomponent “high-entropy alloys (HEAs)” based on refractory elements (Cr-Mo-Nb-Ta-V-W-Hf-Ti-Zr) possess exceptional strengths at high temperatures but the physical origi...