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- W3138725318 abstract "• EBSD misorentation analysis is developed to depict localized creep-fatigue damage. • GND density map is explored to understand creep-fatigue failure physical mechanism. • Semi-quantitative study of EBSD parameters supports microscopic damage degree. A large number of strain-controlled creep-fatigue tests under wide loading waveforms are conducted at 650 ℃ in nickel-based forged GH4169 superalloy. Comprehensive characterizations, including scanning electron microscope (SEM), electron backscatter diffraction (EBSD) and transmission electron microscope (TEM), are observed from the post-test examinations. Particular focus is brought to the physical understanding of damage mechanisms under wide creep-fatigue loading conditions using EBSD analysis. The representative misorientation parameters are calculated for constructing diffraction-based misorientation mapping. Semi-quantitative analysis of longitudinal EBSD observations is conducted to prove that strain ratio has little influence on creep-fatigue damage degrees, while dwell time causes noticeable changes to damage progressions. In particular for geometrically necessary dislocation (GND) map explored in this work, more fundamental information based on failure physics is obtained to analyze the creep-fatigue crack initiation mechanism." @default.
- W3138725318 created "2021-03-29" @default.
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- W3138725318 date "2021-08-01" @default.
- W3138725318 modified "2023-09-30" @default.
- W3138725318 title "Semi-quantitative creep-fatigue damage analysis based on diffraction-based misorientation mapping and the correlation to macroscopic damage evolutions" @default.
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- W3138725318 doi "https://doi.org/10.1016/j.ijfatigue.2021.106227" @default.
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