TiC颗粒增强钛基复合材料的形变断裂  

Deformational Fracture of Titanium Matrix Composites Reinforced by TiC Particles

作　　者：毛小南[1] 周廉[1] 曾泉浦[1] 魏海荣[2] 

机构地区：[1]西北有色金属研究院,西安710016 [2]东北大学,沈阳110006

出　　处：《稀有金属材料与工程》2000年第4期217-220,共4页Rare Metal Materials and Engineering

摘　　要：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。The fracture of titanium matrix composite reinforced by TiC particles has been studied. The results indicate that the proportion of defective particles will significantly influence the crack propagation rate. Regular and non defective particles will not fracture easily during the initial deformation, and hence will greatly enhance the crack extension energy. On the contrary, the easily broken particles enhance the extension stress at the crack tip, and hence the propagation rate of the crack. Suitable heat treatment will increase the crack extension energy, and improve the plasticity of the composite.

关 键 词：塑性功 应力 颗粒增强钛基复合材料 断裂 

分 类 号：TB331[一般工业技术—材料科学与工程]