Rev.Adv.Mater.Sci. (RAMS)
No 2, Vol. 33, 2013, pages 148-152

FRACTAL RESEARCH APPROACH ON THE FRACTURE SEM IMAGE
OF Ti2AlC/TiAl COMPOUND MATERIALS

Y. Li, Y. L. Yue, H.T. Zhang and M. Wen

Abstract

The Ti2AlC/TiAl compound materials have the finer mechanics performance under the normal temperature compared to the TiAl alloy. The author will use the computer simulation to establish the model. The article explores that the fracture theory is used to deal with the interface topography's SEM image of the materials' heat treatment process. At last through the linear regression analysis, the curve fitting equation is obtained. The results show that the quantitative relationship between the fractal dimensions and the heating temperature, as well as the quantitative relationship between different heat treatment ways and bending strength, fracture toughness. This research indicates that the SEM images of Ti2AlC/TiAl materials with different temperature in rapid heating heat treatment have different fractal dimension. The fractal dimension of the fracture images of the samples with element B decreases with the increase of the fracture toughness. While that of the samples without element B shows the characteristics of brittle materials, namely, the fracture toughness increases with the increase of the fractal dimension.

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