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利用Slit island方法研究了不同晶粒尺寸的高强铝合金7475在一定条件下超塑变形断裂时,断口表面的分形维数。结果表明,断裂表面是一种分形结构,断口表面的分形维数D_F值越大,材料的超塑性能越好。
The fractal dimension of the fracture surface under different conditions of superplastic deformation fracture under certain conditions was studied by Slit island method. The results show that the fracture surface is a fractal structure. The larger the fractal dimension of the fracture surface is, the better the superplasticity of the material is.