The damage evolution of in-situ creep experiment of a brass alloy Cu-40Zn-2Pb has been studied using high resolution synchrotron X-ray microtomography. This technique (XMT) offers new possibilities for a non-destructive determination of creep damage evolution and it provides direct images of the bulk of the materials. Different creep damage extents between the surface and in the bulk of samples was previously reported, however no clear evolution of damage of those regions was deduced. In the present study, an in-depth and systematic investigation of the spatial inhomogeneities of creep cavities using XMT has been carried out. The well-known analysis of nearest neighbor distances (NND) and the clustering tendency of cavities were performed for the bulk and the surface of the sample. Furthermore, comparisons of individual cavities evolution in those regions of the sample are given.

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