Abstract
The fretting fatigue behavior of Ni-based polycrystal superalloys at room temperature and 650 °C was studied by fretting fatigue experiment, electron back-scattered diffraction (EBSD) and polycrystal plasticity simulation. The life results and fracture morphology were obtained. The grain morphology, misorientation parameters, high-angle and low-angle grain boundary and geometrically necessary dislocation (GND) density were analyzed by EBSD. A polycrystal plasticity fretting fatigue simulation framework considering microstructure was developed. The effects of grain boundary, contact edge and temperature on stress and dominant slip distribution were analyzed, and the evolution of the dominant slip system in the loading process was discussed.
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