Crystallographic analysis of behavior of hydrogen embrittlement in aluminium alloy using diffraction contrast tomography

Abstract

Effects of hydrogen on fracture behavior in Al-Zn-Mg alloy have been crystallographically assessed using diffraction contrast tomography (DCT), which provides a description of the 3D crystallographic orientations of individual grains and the grain shape in polycrystalline materials. In this study, the fracture surface was mostly intergranular cracking, except some parts of no quasi-cleavage fracture. The intergranular crack initiated at a grain boundary surface perpendicular to the loading axis and adjacent to big grain.