Deformation behavior and enhanced plasticity of Ti-based metallic glasses with notches

Abstract The plasticity of Ti-based metallic glasses with different aspect ratios can be improved by introducing two semicircular notches on the edges of the samples, owing to the interactions of shear bands (SBs) under conventional compression tests. The interaction of SBs can be ascribed to the easy initiation of SBs around the notches due to the large stress gradient, and the consequent blocking effect of notches on the propagation of shear bands. Additionally, the current findings provide a new way to understand the physical nature for the plastic deformation behavior of some brittle metallic glasses and supply an effective approach to enhance the plasticity to some extent. Keywords: metallic glassshear bandnotchesstress gradientplasticity Acknowledgements The authors would like to thank Prof. Y.S. Yang for the technical assistance on the finite element software, and Prof. A.L. Greer and Prof. L.Z. Sun for the stimulating discussion. This work was financially supported by the National Natural Science Foundation of China (NSFC) under Grant Nos. 50625103, 50871117, 50890173 and 50931005.