The effect of strain-induced internal state modulation created by cold rolling on the plastic deformation of Ti 40Zr 25Ni 8Cu 9Be 18 bulk metallic glass was investigated. The pre-plastic deformation is very effective for improving the room temperature compressive plasticity, i.e., the plastic strain is remarkably enhanced up to ∼14.5%. The origin of the improved room temperature plasticity is related to the introduction of a strain-mediated heterogeneous microstructure composed of shear softened regions and surrounding undeformed hard regions, providing rather uniform plastic flow.
Bibliographical noteFunding Information:
This work was supported by the Defense Acquisition Program Administration (DAPA) and the Agency for Defense Development (ADD) , and also supported by the Global Research Laboratory Program of the Korea Ministry of Science and Technology and by the Center for Advanced Materials Processing (CAMP) of the 21st Century Frontier R&D Program of the Korea Ministry of Knowledge Economy. Stimulating discussions with J.H, Han, K.B. Kim, M. Stoica, N. Mattern, S. Gorantla, S. Pauly, S. Scudino, U. Kühn and W.T. Kim are gratefully acknowledged.
All Science Journal Classification (ASJC) codes
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry