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- W2803287836 abstract "In this work, the influence of the geometrical defect size on the high cycle fatigue behavior of polycrystalline aluminium with different grain sizes is investigated, to better understand the role of internal length scales. Two sizes of grains and defect are used: 100 μm and 1000 μm, the grain size being controlled with thermomechanical treatments. Fully reversed stress-controlled fatigue tests are then carried out. According to fatigue test results, surface crack initiation is delayed when the grain size is reduced, while an approximation of the fatigue limit shows that it is not much influenced by the average grain size. The relative defect diameter (compared to the grain size) seems to be the leading parameter influencing fatigue crack initiation from a defect. Finally, Electron BackScattered Diffraction (EBSD) maps are collected for specimens with large grains and small defects. Fatigue crack initiation from a defect is found to be strongly impacted by the crystallographic orientation of the surrounding grain, crack initiation preferably occurring in crystals being favorably oriented for plastic slip." @default.
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- W2803287836 date "2018-01-01" @default.
- W2803287836 modified "2023-09-26" @default.
- W2803287836 title "Interactions between geometrical defects and microstructure during high cycle fatigue of polycrystalline aluminium with different grain sizes" @default.
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- W2803287836 doi "https://doi.org/10.1051/matecconf/201816514004" @default.
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