Evaluation of the Influence of Grain Structure on the Fatigue Variability of Waspaloy

Abstract

Considerable effort is spent controlling the microstructure of superalloys that are used in fracture critical rotating structures for gas turbine engines. It is generally understood that a controlled, uniform microstructure is necessary for the best, most uniform mechanical properties. The aim of this effort was to evaluate this assumption in Waslapoy using a new approach to assess a material's fatigue performance.