Time-Dependent Corrosion Fatique Crack Propagation in 7000 Series Aluminum Alloys

摘要

The goal of this research is to characterize environmentally assisted subcriticalcrack growth for the susceptible short-longitudinal orientation of aluminum alloy 7075-T651, immersed in acidified and inhibited NaCl solution. This work is necessary in order to provide a basis for incorporating environmental effects into fatigue crack propagation life prediction codes such as NASA-FLAGRO (NASGRO). This effort concentrates on determining relevant inputs to a superposition model in order to more accurately model environmental fatigue crack propagation.