抄録
It is investigated that the effect of the grain size on the scale-dependence of fractal dimension for the fractured surface of steel. The effect is considered to appear for the fractured surface of diffusion-bonded steel joint. In this research, the fractured surface of cupper-brazed steel joint was analyzed, whose texture was free from the effect of grain size. The contribution of brazing filler thickness to the scale-dependence of fractal dimension was also discussed. For the each fractured surface of cupper-brazed steel joint, the scale-dependence of fractal dimension did not appear clearly, but the fractal dimension increased up to 2.0 for the larger scale than the correlation length similar to the brazer filler thickness. As conclusions, the texture with the effect of grain-size could show the scale-dependence in fractal dimension. And for the fractured surface of brazed joint, the texture could deal as typical ductile surface at the scale range smaller than the brazing filler thickness.
