本文利用垂直截面法测量了7475Al 合金在不同温度、不同应变速率及不同晶粒尺寸条件下超塑拉伸变形时断裂表面的分形维数。结果表明:断裂表面的分形维数越高,合金超塑拉伸破断时的延伸率越大。
Fractal dimensions of fracture surfaces of 7475 Al were measured by verticalsection method when the alloy was deformed under different temperaute,strain rate andgrain size.The results show that the higher the fractal dimension of fracture surface,thelarge
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