Short term sub-glass transition annealing controls the structural reordering and nanocrystallization of $\mathit{CuZr}-$based bulk metallic glasses (BMGs). Using this method, 5 times higher resistance against strain softening as confirmed by three-point bending tests is attained. Homogenously dispersed nanoparticles in sizes of 20–50 nm accounts for the remarkable shifts and peak formations on reciprocal space together with the diffraction spots observed on 2D diffraction pattern. Real-space pair distribution function analysis reveals noticeable changes in peak shapes and positions correlated with the changes in short- to medium-range ordering. The differences in the partial nearest neighbor numbers upon annealing mark the dominant $\mathit{Zr}-\mathit{Zr}$ pair to diminish whereas the $\mathit{Cu}-\mathit{Cu}$ pair becomes prominent, hinting that $\mathit{Cu}$ diffusion is mainly responsible for structural reordering and formation of new phases. The pursued study using hard X-ray synchrotron radiation reveals important aspects of structural changes preceding nanocrystallization, which in turn enhances the mechanical performance in BMGs.

短期亚玻璃化转变退火控制着结构的重排和纳米晶化 $\mathit{锆石}-$基础的大块金属玻璃（BMG）。使用这种方法，可以实现三点弯曲试验所证实的抗应变软化能力高5倍。均质分散的纳米颗粒尺寸为20–50 nm，这是在互易空间上发生了明显的位移和峰形成的原因，同时也是在2D衍射图上观察到的衍射点。实空间对分布函数分析揭示了峰形和位置的显着变化，与短至中程有序变化相关。退火时局部最近邻居数的差异是显性的$\mathit{锆}-\mathit{锆}$ 对减少，而 $\mathit{铜}-\mathit{铜}$ 对变得突出，暗示着 $\mathit{铜}$扩散主要负责结构的重新排序和新阶段的形成。进行的使用硬X射线同步加速器辐射的研究揭示了纳米结晶之前结构变化的重要方面，这反过来又增强了BMG的机械性能。