TiC颗粒增强钛基复合材料的形变

The Deformation of TiC Particle Reinforced Titanium Matrix Composite

研究了 Ti C颗粒增强钛基复合材料增强颗料和基体之间的不均匀形变 ,得出颗粒和基体之间在形变过程中产生形变摩擦阻力 ,通过弹塑性力学计算出的 Ti C/ Ti界面上颗粒阻碍基体变形力为 Ti C强度的 0 .6倍 ,阻碍基体中滑移的进行 ,使基体得到强化。另一方面 ,当界面上的形变应力同基体的某个晶面形成位错源时 ,可放出位错环 ,使应力得到释放 ,同时增加基体的位错密度 ,位错互相缠绕形成胞状亚结构 ,强化基体。

The un-uniformed deformation TiC particle reinforced titanium matrix composite has been studied. The results show that the deformed frictional constraint appears between the particle and the matrix and resists the deformation of matrix and strengthens it. By using the theory of elastic-plastic mechanics, the deformed frictional constraint calculated is 0.6 times of the strength of TiC particle,when the stress gathering appears on the interface and the dislocation resource are formed at a certain crystalline plane,a series of dislocation rings release and the stress gathering on the interface is freed,in the meantime the density of dislocation in the matrix increases,the dislocations tangle each other to form celluloid substructure and thus strengthen the matrix.