Deformation and strain rate sensitivity of a Zr-Cu-Fe-Al metallic glass

作者：Gonzalez S^*; Xie G Q; Louzguine Luzgin D V; Perepezko J H; Inoue A

来源：Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing, 2011, 528(9): 3506-3512.

DOI：10.1016/j.msea.2011.01.049

• Bulk amorphous alloys
• Plasticity

The deformation behaviour of Zr65Cu20FeSAl10 bulk metallic glass has been studied at room temperature under uniaxial compression conditions at the strain rate of 5 x 10(-4) s(-1) performing jump tests for the strain rates (SR) ranging between 5 x 10(-6) s(-1) and 5 x 10(-2) s(-1). The alloy always shows the formation of shear bands and exhibits serrated flow. In the SR range of 5 x 10(-6) to 5 x 10(-3) s(-1) absence of strain rate sensitivity within the experimental error is observed. However, when the SR changes from 5 x 10(-3) s(-1) to 5 x 10(-2) s(-1) the alloy exhibits a negative strain rate sensitivity of -0.0026. The number of shear bands on the side view appears to be correlated with the range of stress softening from the maximum stress to the stress at which the sample fails.

• 出版日期2011-4-15