Effects of hydrostatic pressure on mechanical behaviour and deformation processing of materials

摘要

The processing and subsequent mechanical behaviour of a variety of commercially important materials are affected by the imposed stress state. In this review, the experimentally documented effects of superimposed pressure on deformation under quasistaticconditions are summarised, followed by a presentation of the effects of superimposed pressure on the fracture behaviour of a variety of materials including both ductile and brittle systems. It is shown that the pressure responses of a variety of materials show distinct differences and the potential reasons for these differences are presented. Finally, in the light of all of these observations, the effects of changes in stress state on deformation processing are reviewed. In particular, the evolution ofhydrostatic stresses during various forming operations is covered followed by a review of published work and the potential benefits of superimposing pressure during processing of a variety of materials.