Abstract
The structural evolution of Cu60Zr20Ti20 bulk metallic glass during rolling at different strain rates and cryogenic temperature was investigated by X-ray diffraction (XRD), differential scanning calorimetry (DSC) and high-resolution transmission electron microscopy (HRTEM). It is revealed that the deformation-induced transformation is strongly dependent on the strain rate. At the lowest experimental strain rate of 1.0×10−4 s−1, no phase transformation occurs until the highest deformation degree reaches 95%. In a strain rate range of 5.0×10−4−5.0×10−2 s−1, phase separation occurs in a high deformation degree. As the strain rate reaches 5.0×10−1 s−1, phase separation and nanocrystallization concur. The critical deformation degree for occurrence of phase transformation decreases with the strain rate increasing.
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