| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 771188 | Engineering Fracture Mechanics | 2009 | 6 Pages |
Abstract
A series of fatigue test samples made of 7075-T651 aluminum were interrupted at various life fractions and the number of debonded, cracked particles and cracks in the metal matrix was determined quantitatively as a function of load cycles. It was found that only cracked constituent particles nucleate a matrix crack. The crystallography of one individual crack and its three-dimensional shape was determined by serial sectioning in a scanning electron microscope by applying focused ion beam (FIB) milling in combination with orientation imaging microscopy (OIM). The limited data suggest that the initial growth direction of a crack is influenced by the crystallographic orientation of the matrix into which the crack is growing.
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Authors
H. Weiland, J. Nardiello, S. Zaefferer, S. Cheong, J. Papazian, Dierk Raabe,