Torsional behaviors in Zr-based bulk metallic glass with high stored energy structure

Abstract To overcome brittleness of bulk metallic glasses, great efforts have been devoted to optimizing BMGs′ plasticity under compressive, tensional or bending load. Yet, it is hardly found any work done to enhance torsional plasticity of BMGs. Herein, based on the different stored energy of BMGs determining diverse properties, we introduce the energy into Zr 54.46 Al 9.9 Ni 4.95 Cu 29.7 Pd 0.99 BMG by a high rheological rate forming method, leading to the higher microstructural heterogeneity, which is conducive to increase not only the plasticity (from 0.2% up to 1.56%) but also the ultimate strength from (990 MPa up to 1110 MPa) on the torsional deformation effectively. This work provides a new orientation to break through the brittleness of BMGs.