考察了几种不同基体和状态的ＳｉＣ晶须增强铝合金复合材料在拉伸变形过程中流变应力的变化情况，发现复合材料的强化效果与基体强度有关，混合法则（ＲＯＭ）对复合材料抗拉强度的预测与实验值偏差较大，基体强度高的复合材料在拉伸变形过程中出现低应力屈服现象，复合材料的加工硬化能力明显高于基体，文中对出现这些现象的原因进行了探讨 The change of flow stress in the process of tensile deformation of SiC whiskers reinforced with SiC whisker was investigated. It was found that the strengthening effect of the composite was related to the strength of the matrix. The mixing law (ROM) The prediction of the strength is quite different from the experimental value. The composite with high matrix strength exhibits low stress yielding during the tensile deformation and the work hardening ability of the composite is obviously higher than that of the matrix. The reasons for these phenomena are discussed