Mechanically driven phase separation and corresponding microhardness change in Cu60Zr20Ti20 bulk metallic glass

Qingping Cao; Jinfi Li; Yaohe Zhou; Jianzhong Jiang
February 2005
Applied Physics Letters;2/21/2005, Vol. 86 Issue 8, p081913
Academic Journal
Rolling deformation of bulk Cu60Zr20Ti20 metallic glass has been performed at cryogenic temperature. The specimens exhibit excellent ductility, and are rolled up to 97% reduction in thickness without fracture. Crystallization is suppressed during the deformation, however, phase separation is observed in the glassy matrix when the thickness reduction exceeds 89%. Once the phase separation occurs, the microhardness of the specimen increases drastically, indicating the existence of work hardening by severe plastic deformation of the metallic glass.


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