TRANSVERSE RUPTURE STRENGTH OF Ni BONDED Ti(C, N) CERMET AND FRACTAL DIMENSION ANALYSIS OF ITS FRACTURE SURFACES

Acta Metall Sin

1995, Vol. 31

Issue (5): 229-235 DOI:

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TRANSVERSE RUPTURE STRENGTH OF Ni BONDED Ti(C, N) CERMET AND FRACTAL DIMENSION ANALYSIS OF ITS FRACTURE SURFACES

LIU Ning; ZHAO Hingzhong; JIANG Laizhu; LUO Huiguo; HU Zhenhua; CUI Kun(Huazhong University of Science and Technology; Wuhan 430074)

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LIU Ning; ZHAO Hingzhong; JIANG Laizhu; LUO Huiguo; HU Zhenhua; CUI Kun(Huazhong University of Science and Technology; Wuhan 430074). TRANSVERSE RUPTURE STRENGTH OF Ni BONDED Ti(C, N) CERMET AND FRACTAL DIMENSION ANALYSIS OF ITS FRACTURE SURFACES. Acta Metall Sin, 1995, 31(5): 229-235.

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Abstract The relationships among the fractal dimension of fracture surfaces, transverse rupture strength and microstructure of Ti(C, N) based cermets have been studied. The microfracture fractal model of cermets and the estimated fractal dimension formula of fracture surfaces have been proposed. The experimental results have shown that the logarithm value of transverse rupture strength, lgσbb , increases with the increase of fractal dimension DF, and has a linear equation relationship. The change of microstructure has a considerable effect on the fractal dimension. The measured fractal dimension depends on the choice of measuring unit. There is an upper critical measuring unit εK′to the Ti(C, N) based ceimets.

Key words: fractal dimension fracture morphology fractal model Ti(C N) cermet

Received: 18 May 1995

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