Abstract Localized heating during slip avalanches is relevant to the understanding of the transition from shear banding to cracking in bulk metallic glasses (BMGs). Here we focus on the released elastic energies (incorporating the influence of machine stiffness) and avalanche durations for regularly appearing large avalanches to study the maximum temperature increases of a Zr-based BMG compressed at three strain rates of 3 × 10−5, 3 × 10−4, and 3 × 10−3 s−1. The maximum released elastic energies during slip avalanches decrease with the increase of strain rates. The durations of the avalanches are on the scale of tens of milliseconds for each strain rate. As strain rate increases, the maximum temperature rises due to shear-band slips are decreased from 2.6, 2.3 to 1.9 K. Moderate heating during the large slip avalanches for three strain rate implies that thermal softening has only a small effect on the shear-banding instability.

中文翻译：

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块状金属玻璃中应变率相关雪崩期间的温度升高

摘要 滑动雪崩期间的局部加热与理解大块金属玻璃 (BMGs) 从剪切带到开裂的转变有关。在这里，我们关注释放的弹性能（包括机器刚度的影响）和经常出现大雪崩的雪崩持续时间，以研究以 3 × 10−5、3 × 三种应变率压缩的 Zr 基 BMG 的最大温度升高10−4 和 3 × 10−3 s−1。滑雪崩过程中最大释放的弹性能随着应变率的增加而降低。对于每个应变率，雪崩的持续时间在数十毫秒的范围内。随着应变率的增加，由于剪切带滑移导致的最大温升从 2.6、2.3 降至 1.9 K。