(1 中国科学院金属研究所， 沈阳 1100152 东北大学材料测试中心， 沈阳 110006
)
摘 要: 分析研究了挤压复合温度对K2O·6TiO2W/ZA-27合金复合材料的拉伸断口分形维数的影响规律及与拉伸断裂功之间的关系。 研究发现该复合材料的拉伸断口具有统计自相似性， 可以用分形维数来描述， 自相似性的测量步长范围在0.185～3.750μm之间为最佳。 复合材料拉伸断口分形维数同拉伸断裂功之间有较好的对应关系， 分形维数随拉伸断裂功的增加呈线性增大。
关键字: 复合材料 拉伸断口 分形维数
WHISKER REINFORCED ZA-27 ALLOY COMPOSITES
（Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110015, P. R. China
Center of Materials Testing, Northeastern University, Shenyang 110006, P. R. China）
Abstract:The tensile properties were measured by using Instron tensile machine. The fracture surface of K2O·6TiO2W/ZA-27 composites was studied by using fractal geometry. The results on fractal dimension of tensile surface showed that the fracture surface of K2O·6TiO2w/ZA-27 composites has statistics self-similar property and can be investigated and described by fractal dimension. There exist good corresponding relations between tensile fracture work of composites and fractal dimension of fracture surface. The micro-mechanism of tensile fracture of composites was also discussed.
Key words: composites tensile fracture fractal dimension
