Crystal Orientation Effect on the Fretting Fatigue Behavior in Ni-Based Single Crystal Superalloys

Abstract

The crystal orientation effect on the fretting fatigue behavior in Ni-based single crystal superalloys (NBSX) was studied in this paper using crystal plasticity finite element (CPFE) simulation. The crystal plasticity constitutive model considering back stress was applied in the CPFE simulation, and four different crystal orientations were calculated to study the effect of crystal orientation. The CPFE simulation results showed significant differences between the four crystal orientations. The Mises stress and the cumulative shear strain under different crystal orientations was obtained. The change of stress and strain with time at different locations showed obvious difference under four crystal orientations. The simulation results showed obvious stress concentration near the contact edge, but the peak locations of cumulative shear strain would change under different crystal orientations.KeywordsFretting fatigueSuperalloyCrystal orientationCPFE simulation