日本金属学会誌

J. Japan Inst. Metals, Vol. 60, No. 8 (1996),
pp. 775-780

Fractal Analysis of Graphite Shape in Cast Iron

Masahiro Ando and Tadashi Nishihara

Department of Mechanical Engineering, Faculty of Engineering, Kokushikan University, Tokyo

Abstract:

The concept of fractal dimensions has been applied to the description of the morphologies of graphite shapes of cast iron. The fractal dimensions of the image surfaces were experimentally determined by using the Box-counting theorem. The results obtained are as follows:
(1) The fractal dimensions of the gray iron changed corresponding to the types of flake graphite shapes.

(2) The Box-counting plots for the graphite shapes were classified into two linear parts characterized by two fractal dimensions. The fractal approach could be available to graphite shape characterization.

(3) The fractal dimensions of the matrices of cast irons were estimated to be about 1.99.


(Received December 13, 1995)

Keywords:

fractal, fractal dimension, image analyzer, box-counting, cast iron, flake graphite shape, nodular graphite shape


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