论文部分内容阅读
通过单向压缩实验在试样长径比(H/D)和加载速率分别为1:1~2.5:1和1×10~(-5)~1×10~(-2)s~(-1)的条件下对Cu_(50)Zr_(40)Ti_(10-x) Ni_x(0≤x≤4,摩尔分数,%)块体金属玻璃的室温力学性能进行了系统研究。在长径比为1:1的情况下,当加载速率为1×10~(-4)s~(-1)时,Cu_(50)Zr_(40)Ti_(10)块体金属玻璃表现出超塑性;而Cu_(50)Zr_(40)Ti_(10-x) Ni_x(x=1~3,摩尔分数,%)块体金属玻璃在加载速度为1×10~(-2)s~(-1)的条件下出现超塑性;塑性应变(ε_p)、屈服强度(σ_y)和断裂强度(σ_f)显著地依赖于长径比和加载速率;当加载速率为1×10~(-2)s~(-1)时,长径比为1:1的块体金属玻璃的屈服强度几乎与其他长径比的块体金属玻璃的断裂强度接近;另外,本文作者也探讨了铜基块体金属玻璃力学性能对加载速率和长径比的响应机理。
Through the uniaxial compression test, the aspect ratio (H / D) and the loading rate of 1: 1 ~ 2.5: 1 and 1 × 10 -5 ~ 1 × 10 -2 s ~ 1), the mechanical properties at room temperature of bulk metallic glass Cu 50 Zr 40 Ti 10-x Ni x (0≤x≤4, mole fraction,%) were studied systematically. When the aspect ratio is 1: 1, the Cu 50 Zr 40 Ti 10 glassy metal glass shows a good corrosion resistance at 1 × 10 -4 s -1, Superplasticity. The bulk metallic glass of Cu 50 Zr 40 Ti 10-x Ni x (x = 1 ~ 3, mole fraction,%) -1). The plastic strain (ε_p), yield strength (σ_y) and breaking strength (σ_f) are significantly dependent on the aspect ratio and the loading rate. When the loading rate is 1 × 10 -2, s ~ (-1), the yield strength of bulk metallic glass with an aspect ratio of 1: 1 is almost the same as the rupture strength of bulk metallic glasses with other aspect ratios. In addition, Response mechanism of mechanical properties of metal glass to loading rate and aspect ratio.