Rapporteur’s Synthesis

Abstract

Important requirements for materials are temperature, stress and environment, but actually those are second-order requirements. The first order goals are reliability of components, defined component life and the price of the equipment. I will try to summarise what I found in the paper and the posters of this session. Principally, today we were dealing with Fe, Ni, Cr, Al systems; there fore, depending on the applications with Ni or Fe-based alloys and some Co-based materials. These are strengthened by adjustment of grain-size, dislocation substructure, precipitation hardening. Precipitates, in general, are carbides and gamma prime and possibly dispersoids. The limitation always mentioned are stress rupture properties and small critical defect sizes. It is interesting to note that nobody really mentioned creep properties. Everybody talked about stress rupture properties.