Abstract Compressive mechanical response of a Zr-based bulk metallic glass is investigated in the strain rate range of 0.0001/s–9000/s. Negative strain rate dependency of the peak stress is revealed which shows a 30% decrease compared with the static date. Rate dependent melting phenomenon is indicated by measuring the width of vein-like structures on the fracture surface after each compression at different strain rates. The mechanisms of temperature rise localizing in a shear band are explored for analyzing the melting behavior, the reduced viscosity and the resultant stress decrease. The characteristic transition from non-Newtonian to Newtonian flow in the shear bands correlated to the strain rate is addressed. The melting liquid is also involved in the dynamic deformation straining through forming high-density nano-space wrinkle structures for a considerable toughness.

中文翻译：

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Zr 基块体金属玻璃的速率依赖性：强度和断裂特性

摘要 研究了 Zr 基块状金属玻璃在 0.0001/s–9000/s 应变速率范围内的压缩机械响应。揭示了峰值应力的负应变率依赖性，与静态数据相比，它显示了 30% 的降低。通过在不同应变率下每次压缩后测量断裂表面上脉状结构的宽度来指示速率依赖性熔化现象。探讨了剪切带中局部升温的机制，以分析熔化行为、降低的粘度和由此产生的应力降低。解决了与应变率相关的剪切带中从非牛顿流到牛顿流的特征转变。