MECHANICAL ASPECTS OF HIGH-TEMPERATURE OXIDATION

Under service conditions it is most often not high temperature corrosion alone which causes failure of components but the interaction with simultaneous mechanical stresses. A kev role is played in this case by the protective surface oxide scales which may crack and heal. This role is discussed in the form of model considerations for the beginning of scale failure under tensile. compressive and more complex stress situations. Discussion leads to the formulation of rules for a protective scale with optimum behaviour under the effect of stresses.