Determination of the effective Young's modulus of medium with microstructure typical for hydrogen degradation


The paper aims at calculation of the effective elastic properties of metals with a microstructure typical for hydrogen-enhanced degradation. For the purpose of this study, we use the Maxwell homogenization scheme and explicit expression for compliance contribution tensor to determine the overall Young's moduli. The model introduces oblate spheroids to describe intergranular microcracks and spheres to describe pores. Within the frame of the paper, we consider random orientations of the microcracks, certain preferential orientation accompanied by random scatter with the scattering parameter and random orientations of the spheroids’ axes in the same plane. The dependences of the effective Young's moduli on the porosity and aspect ratio of the spheroid have been studied.