通过对 Ti C颗粒增强钛基复合材料断裂研究表明 :Ti C颗粒的缺陷比例对复合材料的断裂裂纹扩展速率有较大影响。形状规则且无缺陷的粒子在受力的初期不易破断 ,可较大提高裂纹扩展所需能量。反之 ,易破碎的粒子则增加了裂纹尖端的扩展应力 ,提高了裂纹扩展速率。适当的热处理可提高裂纹扩展所需塑性功 ,从而在一定范围内改善复合材料塑性。 Through the TiC particles reinforced titanium matrix composite fracture research shows that: TiC particles of the defect ratio of the composite crack growth rate has a greater impact. Regular shape and defect-free particles in the initial force is not easy to break, can greatly improve the crack growth required energy. On the contrary, the brittle particles increase the crack tip expansion stress and increase the crack propagation rate. Proper heat treatment increases the plastic work required for crack propagation, thereby improving the ductility of the composites to a limited extent.