Abstract
Plastic deformation behaviors of Zr 52.5Al 10Ni 10Cu 15Be 12.5, Mg 65Cu 25Gd 10 and Pd 43Ni 10Cu 27P 20 bulk metallic glasses (BMGs) are studied by using the depth-sensing nanoindentation, macroindentation and uniaxial compression. The significant difference in plastic deformation behavior cannot be correlated to the Poisson's ratio or the ratio of shear modulus to bulk modulus of the three BMGs, but can be explained by the free volume model. It is shown that the nucleation of local shear band is easy and multiple shear bands can be activated in the Zr 52.5Al 10Ni 10Cu 15Be 12.5 alloy, which exhibits a distinct plastic strain during uniaxial compression and less serrated flow during nanoindentation.
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