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Self-Affine Analysis of Fractures Surfaces of an Aluminum Alloy Using Fractographic Techniques

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Abstract:

We report the self-affine analysis on fracture surfaces of an A319-type aluminum alloy with different modification and refinement treatments, broken both in Charpy impact and cyclic impulse tests. The in-plane and out-of-plane Hurst exponent as well as the correlation length are obtained using quantitative fractographic techniques. It is found that the Hurst exponent, ζ, has a value of about 0.8 and is not influenced neither by the crack propagation modes nor by the microstructural condition. The self-affine correlation length is found to be related to the grain size resulting from the refining and modifying treatments applied to the alloy.

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Periodical:

Materials Science Forum (Volume 560)

Pages:

91-96

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.560.91

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Online since:

November 2007

Authors:

M. Hinojosa, Edgar I. Morales, N. Mohamed

Keywords:

Aluminium Alloy, Correlation Length, Fracture Surface, Hurst Exponent

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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