Abstract
Stress overshoot related to the variation in free volume is an important phenomenon in cylinder compression tests of bulk metallic glasses (BMGs). A Maxwell-pulse constitutive model was proposed according to the overshoot of Zr 55Cu 30Al 10Ni 5 BMG in the supercooled liquid region (SCLR). Compression experiments and the constitutive model showed good agreement, especially with regard to the stress overshoot phenomenon. Furthermore, micro-backward extrusion experiments and numerical simulation were conducted in SCLR. The results showed that the constitutive model describes the mechanical behavior of the BMG well.
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