应力诱导马氏体相变增韧铜锆基金属玻璃复合材料大弹性变形行为的微观机制研究

以应力诱导马氏体相变增韧铜锆基金属玻璃复合材料为研究对象，采用激光处理等方法改变金属玻璃复合材料的第二相分布形态，采用拉拔、压缩、轧制和高压扭转等方法对金属玻璃复合材料进行预塑性变形，结合高速光学显微成像等宏观尺度和小尺度的原位观察技术，观察与分析预变形金属玻璃复合材料的大弹性变形行为，主要研究：1）预变形方式对应力诱导马氏体相变增韧金属玻璃复合材料弹性行为的影响；2）B2相分布形态对应力诱导马氏体相变增韧金属玻璃复合材料的界面力学行为；3）预变形和弹性二次加载条件下B2相和非晶基体的协同变形机制。通过深入分析金属玻璃复合材料的微观结构和力学行为之间的关系，揭示应力诱导马氏体相变增韧金属玻璃复合材料大弹性变形行为的微观机制。此研究目标的实现有助于深入认识金属玻璃复合材料的变形行为，并为设计具有优良弹性性能的金属玻璃复合材料提供理论支持和实验证据。

In this project, by using tension, compression, bending, multiaxial loading, supported by in-situ observation technique, the elastic deformation behaviors of metastable B2 phase toughened metallic glass composites processed by laser treatment and plastic predeformation will be investigaed. Firstly,by controlling the plastic predeformation method, the elastic deformation behaviors of the metallic glass composites will be observed and analyzed. Secondly, by laser treatment, the morphology of the B2 phase will be tailed, and the effect of B2 morphology on the elastic behaviors of the metallic glass composites will be investigated. Thirdly, the deformation coordination of the B2 phase and the amorphous matrix during the plastic predeformaiton and the second elastic loading will be studied. Based on the experimental observaion and theoretical analysis, the micromechanism of large elastic behavior in metallic glass composites toughened by metastable B2 will be revealed. These research results should be helpful for us to understand the deformation behaviors of metallic glass composites more deeply, and also useful to provide the important experimental results and theoretical consideration for designing new metallic glass composites with better performance properties.