抄録
In ductile fracture, the cup and cone fracture which occurs at the neck of a specimen is produced by the coalescence of internal voids, which in turn grow by plastic deformation under the influence of a prevailing stress triaxiality. In this study, we link simulations at a macro-scale tensile model to that of micro-scale void models to investigate the effects of hydrogen on the tensile properties of metals and alloys. The tensile test model is used to find out the hydrogen effects at the macro-scale while the internal void model is used to find out the influence of hydrogen on the void growth, which may serve as a mechanism of hydrogen embrittlement. Loads in micro-scale are imported from the displacement results of the macro-scale tensile model. The results are qualitatively verified by experimental observations in previous studies.
