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The paper provides an insight into the development of the micropore damage phenomena during the hydrogen ingress and egress process in a high strength aluminum alloy. For this purpose high resolution ...micro tomography scans on samples subjected to combinations of cathodic hydrogen charging and de-sorption heat treatment were carried out. From the quantitative analysis, spatial mapping of pores and particles, and a probabilistic evaluation of the 3D datasets it was conclusively shown that the development of micropore damage during hydrogen ingress – egress had a non-trivial dependence on the particle size distribution. This potentially provides rationale to mitigate the deleterious effects of hydrogen in aluminium alloys by controlling particle size and distribution in the matrix.show more
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