Simultaneously Enhancing the Ductility and Strength in a Hierarchical and Multiphase Nanolaminated TiZrAlV

High strength and ductility are the prerequisite for structural materials for wide applications. Here, a simultaneous enhancement of both the ductility and strength is reported in a hierarchical and multiphase nanolaminated (HMN) TiZrAlV prepared via thermomechanical processing treatments. An excellent combination of high ultimate tensile strength of σb ~ 1550 MPa and good elongation to failure of ef ~ 8.0% is obtained in an appropriate HMN structure that consists of nanoscale α″ martensites, submicroscale α plates, and large microscale primary αp grains, much better than that (σb ~ 1440 MPa, ef ~ 3.6%) of its coarse-laminated counterpart without primary αp grains. The present study is significant for the enhancement of strength and ductility of engineering materials via the design of hierarchical-laminated structure.