The nucleation of voids or cavities represents one of the main aspects of the ductile microfracture process in solids, specially in metals and alloys, subjected to high straining as in forming or impact problems. It is established that the ductility of the materials is increased if the formation of new microcavities can be stopped or diminished. The influence of the void nucleation on the various coalescence mechanisms (as direct impingement of the voids, microstrain localisation, etc.) was determined quantitatively in recent studies.
展开▼
