In this work, the relationship between the accumulation and release of elastic energy during the flow serrations of a bulk metallic glass (BMG) was investigated by use of 10 groups of specimens under varying mixed-mode (I/II) loading conditions. The findings have shown that both the elastic energy accumulation rates and load drops have significant variations, and the load drop data are more scattered than elastic energy accumulation rates. The large variations of load drops are intrinsic for BMGs, while the variations of elastic energy accumulation rates can be reduced to improve/control the plastic deformation of BMGs. Moreover, smaller elastic energy accumulation rates can result in smaller load drops, resulting from the formation of more shear-band intersections. The present work is of significance for understanding the underlying mechanisms of flow serrations of BMGs. It also suggests that more attention could be paid into the elastic energy accumulation process in order to uncover the plastic deformation mechanisms of BMGs.

在这项工作中，通过使用10组样品在不同的混合模式（I / II）加载条件下，研究了大块金属玻璃（BMG）的流锯齿过程中弹性能量的积累与释放之间的关系。研究结果表明，弹性能量积累率和载荷下降都具有显着变化，并且载荷下降数据比弹性能量积累率更加分散。载荷下降的大变化是BMG固有的，而弹性能量积累速率的变化可以减小以改善/控制BMG的塑性变形。此外，较小的弹性能量积累速率可导致较小的载荷下降，这是由于形成了更多的剪切带交点而引起的。目前的工作对于理解BMG的流锯齿的潜在机制具有重要意义。这也表明，为了揭示BMG的塑性变形机制，应该更多地关注弹性能量的积累过程。