由于从宏观到原子尺度的结构各向同性和在过冷液相区的净成形能力，非晶合金成为超高精度热塑成形的理想材料。目前，非晶合金的热塑成形已实现纳米尺度的精度，在高精度微纳器件应用方面具有无限潜力。然而，非晶合金在均匀变形后却呈现结构各向异性，产生有害的残余应力，且变形过程中温度和应变速率的改变可导致极大的室温力学性能差异，严重影响其在热塑成形方面的应用。目前，产生这些问题的结构原因尚并不清楚。基于此，本项目采用同步辐射全散射技术，原位观察非晶合金在过冷液相区变形过程中结构状态和变形缺陷的动态变化过程，分析温度和变形速率对结构状态的影响，从结构层次上揭示非晶合金过冷液体的微观变形机理和结构演化的机制。

The isotropic structure from atomic to macroscopic scale and net-shape formability in supercooled liquid state make amorphous alloys an ideal material for high-precision thermoplastic forming. Currently, by thermoplastic forming amorphous alloys can replicate nanoscale features of a mold, exhibiting a great potential for applications in micro/nano-devices. However, amorphous alloys are found to show structural anisotropy after homogeneous deformation, producing undesired residual stress. Meanwhile, changes of temperature and strain rate during homogeneous deformation can lead to a dramatic variation of the room-temperature mechanical properties of amorphous alloys. The underlying structural origin of these problems is still unclear, hindering the application of amorphous alloys in thermoplastic forming. Based on in-situ synchrotron total scattering technique, this project will characterize both structure and deformation defects in supercooled amorphous liquid under deformation at different temperatures and strain rates. This project aims to reveal the deformation and structural evolution mechanisms of the supercooled amorphous liquid from a structural perspective.