期刊
INTERNATIONAL JOURNAL OF FATIGUE
卷 168, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ijfatigue.2022.107460
关键词
Fretting fatigue; EBSD; Polycrystal plasticity simulation; Ni-based superalloy
The fretting fatigue behavior of Ni-based polycrystal superalloys at room temperature and 650 degrees C was investigated using fretting fatigue experiment, electron back-scattered diffraction (EBSD) and polycrystal plasticity simulation. The study obtained the life results and fracture morphology of the alloys. 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 during the loading process was discussed.
The fretting fatigue behavior of Ni-based polycrystal superalloys at room temperature and 650 degrees 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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