Bowen Xu, Huichao Duan, Xuefei Chen, Jing Wang, Yan Ma, Ping Jiang, Fuping Yuan, Yandong Wang, Yang Ren, Kui Du, Yueguang Wei, Xiaolei Wu
The strength-ductility trade-off has long been a Gordian knot in conventional metallic structural materials and it is no exception in multi-principal element alloys. In particular, at ultrahigh yield strengths, plastic instability, that is, necking, happens prematurely, because of which ductility almost entirely disappears. This is due to the growing difficulty in the production and accumulation of dislocations from the very beginning of tensile deformation that renders the conventional dislocation hardening insufficient...
April 11, 2024: Nature Materials