本文借助于分形研究了钢在低温冲击条件下,断裂表面的分形维数与冲击韧性,冲击断裂性质以及微观组织之间的关系。实验结果表明,冲击韧性α_K的对数值随分形维数D_F增加成单调上升的直线关系。显微组织的变化对分形维数有重要影响,分形维数与断裂机制之间存在一定的对应关系。
By means of ftactal analysis, the fractal dimension with relation to the impacttoughness, impact fracture characteristics and microstructures of steel under low temperatureimpact have been investigated. Experimental results show that the logarithms of impact tough-ness increase monotonically with the increase of fractal dimension. The microstructures havea great influence on the fractal dimension. There is a certain correlation between the fractaldimension and fracture mechanism.
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