MICROMECHANISMS OF FRACTURE

Various forms of damage may accumulate in engineering materials during monotonie deformation. The fracture mode is governed by which form of damage first reaches a critical level. Here, the various types of damage and fracture are reviewed. Metallographie evidence of the damage in a range of ferrous and nonferrous materials under various stress states is presented and related to the fracture modes. Fracture mechanism maps are used to show the competition between failure modes, particularly for tests performed under superimposed pressure.