Rev. Met. Paris
Volume 101, Number 9, September 2004Science et Génie des Matériaux
|Page(s)||623 - 635|
|Published online||06 October 2004|
Experimental study of the three-dimensional character of short fatigue cracks in a cast aluminium alloy
Images obtained by high-resolution X-ray tomography are used to show experimentally the three-dimensional character of short fatigue cracks in a cast aluminium alloy. The pores present in this alloy are preferred initiation sites for fatigue cracks, but no correlation can be established with the three-dimensional size of the pores. A strong interaction between fatigue cracks and grain boundaries is clearly shown, both at the surface and in the bulk, using post mortem 3D observations as well as in situ observations.
© La Revue de Métallurgie, 2004
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