提出了用"残余应变不平衡法"来检测SiCf/Ti基复合材料的残余热应力.即在复合材料中单边多加入基体合金而形成层状材料,冷却中因残余热应变不平衡而产生弯曲,测量弯曲变形量,计算复合层间的热应力和应变,得出产生残余热应力的起始温度为704℃.采用Schapery模型计算不同温度下SiCf体积分数为35%的SiCf/Ti6Al4V复合材料热膨胀系数,获得了SiCf/Ti6Al4V复合材料中Ti6Al4V基体和SiC纤维中的平均残余热应力分别为349 MPa和648MPa.
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