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通过正交实验 ,采用极差和方差分析方法确定了生成 Al3Ti/ ZL 10 1原位复合材料的最佳成分 ;测试了复合材料的力学性能 ,并对该材料进行了显微金相分析和透射电子显微分析。研究结果表明 ,与基体材料 ZL 10 1相比 ,Al3Ti/ZL 10 1原位复合材料在其最佳成分配比下 ,强度有较大幅度提高 ,伸长率也略有提高 ;复合材料中原位生成增强体 Al3Ti的尺寸仅为 0 .5μm左右 ,均匀分布于基体晶粒内部 ,同基体结合良好 ;由于细小增强相的作用 ,热处理后复合材料中的共晶硅以粒状形态均匀分布于基体中
The optimum composition of Al3Ti / ZL101 in-situ composites was determined by means of orthogonal experiment and range analysis and variance analysis. The mechanical properties of the composites were tested. The microstructure and transmission Electron microscopy. The results show that compared with the matrix material ZL 10 1, the strength of Al3Ti / ZL101 in-situ composites increases greatly and the elongation increases slightly at the optimum composition ratio of the composites; The size of the Al3Ti reinforcements was only about 0.5μm, uniformly distributed in the matrix grains and well bonded with the matrix. Due to the effect of the fine reinforcing phase, the eutectic silicon in the composite was uniformly distributed in the matrix in the granular form after heat treatment