冲击载荷作用下钛合金中Beta相的动态塑性变形机制研究

As a constitutional phase in titanium alloys, the dynamic deformation mechanism of the Beta phase could strongly affect the mechanical performance and the fracture behavior of titanium alloys. By using the split Hopkinson pressure bar, electronic microscopy, optical microscopy and x-ray diffractometer, this project will investigate the crystal parameters, preferential operating orientations and combinations of the dynamic slip, twinning and stress induced martensite for the Beta phase, aiming to reveal the dynamic deformation mechanisms of the Beta phase during the impact loading. This project is not only academically valuable to the understanding of the dynamic deformation behavior for the solid solution alloy with a body-centered-cubic structure, but also instructive to the optimization of the dynamic mechanical properties for titanium alloys .

作为钛合金中重要的组成相，Beta相的动态塑性变形机制强烈地影响着合金的动态力学性能和断裂行为。本项目计划利用分离式Hopkinson压杆、电子显微镜、光学显微镜和X射线衍射仪，通过研究Beta相的动态滑移、孪生和应力诱发马氏体的晶体学参数、择优开动取向和耦合方式，揭示钛合金中Beta相在冲击载荷作用下的动态塑性变形机制。项目的开展不仅对认识体心立方结构合金固溶体的动态塑性变形行为具有重要的学术价值，而且对优化钛合金的动态力学性能具有重要的指导作用。

作为钛合金中重要的组成相，Beta相的动态塑性变形机制强烈地影响着合金的动态力学性能和断裂行为。本项目利用分离式Hopkinson压杆、电子显微镜、光学显微镜和X射线衍射仪，研究了Beta相的动态滑移、孪生和应力诱发马氏体的晶体学参数、择优开动取向和耦合方式，揭示了钛合金中Beta相在冲击载荷作用下的动态塑性变形机制。项目不仅对认识体心立方结构合金固溶体的动态塑性变形行为具有重要的学术价值，而且对优化钛合金的动态力学性能具有指导作用。