B2相（CsCl结构）增韧的非晶复合材料由于具有优异的综合力学性能而得到越来越多的关注。但其增韧机制主要还停留在宏观剪切带的认识上，缺乏B2相与非晶基体的协同变形机制研究，而微观原子级别的认识还远远不够，更缺乏在原位加载过程中B2相增韧非晶复合材料的力学和结构实时响应机制的深入理解。本项目将采用快速凝固制备Zr-Co-Al合金，结合Al含量的调整和快速凝固工艺的控制来调控合金的组织结构和力学性能，以获得高性能的B2相增韧非晶复合材料，并利用同步辐射高能X射线和高分辨透射电镜原位观察复合材料在加载过程中材料的力学和结构响应机制。结合显微组织结构、材料缺陷演变规律和断口形貌分析，探索合金在原位加载过程中形变诱导马氏体相变及相变诱导塑性机理。通过本项目的实施，一方面为Zr-Co-Al合金的设计与应用提供可靠的理论和实验依据；另一方面为进一步理解B2相增韧非晶复合材料增韧机制具有重要的科学意义。

The amorphous composites toughened by B2 phase (CsCl structure) have received more and more attention due to their excellent comprehensive mechanical properties. However, the toughening mechanism mainly remains in the understanding of the macroscopic shear band, lacking the research on the cooperative deformation mechanism between the B2 phase and the amorphous matrix. The in-depth understanding of the microscopic atomic level and, what’s more, the mechanical and real-time structural response mechanism of the amorphous matrix composites toughened by B2 phase during in-situ loading are far from enough. In this project, Zr-Co-Al alloys will be prepared by rapid solidification. The microstructure and mechanical properties of the alloy will be optimized by controlling the Al content and the rapid solidification process to obtain high-performance amorphous matrix composites toughened by B2 phase. The mechanical and structural response mechanisms of the composites during loading will be observed using in-situ synchrotron radiation high-energy X-rays and high-resolution transmission electron microscopy. Combining the microstructure structure, the evolution of material defects and fracture morphology analysis, the deformation-induced martensitic transformation together with following transformation-induced plasticity during the in-situ loading of the composites will be explored. Through the implementation of this project, on the one hand, it provides a reliable theoretical and experimental basis for the design and application of Zr-Co-Al alloys; on the other hand, it has important scientific significance for further understanding the toughening mechanism of the amorphous matrix composites toughened by B2 phase.