采用Ｘ射线应力分析技术测定ＳｉＣ颗粒体积分数为２０％的ＳｉＣｐ／６０６１Ａｌ复合材料由外加载荷作用而产生的基体铝合金相的实际外载应力，据此计算增强相的实际外载应力．结果表明，基体铝合金相的实际外载应力为平均外载应力的７５．９％，而增强相的实际外载应力为平均外载应力的１９６．６％两相弹性模量的差异是造成这种现象的主要原因 X-ray stress analysis was used to measure the actual external stress of the matrix aluminum alloy phase caused by the applied load in the SiCp / 6061Al composite with 20% SiC particle volume fraction. The actual external stress of the reinforced phase was calculated. The results show that the actual external load stress of the matrix aluminum alloy is 75.9% of the average external load stress, while the difference between the two-phase elastic modulus of the enhanced external phase stress is 196.6% of the average external load stress The main reason for this phenomenon