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- W4313650227 endingPage "107506" @default.
- W4313650227 startingPage "107506" @default.
- W4313650227 abstract "The present study aims to investigate the high cycle fatigue (HCF) performance of steel 316L fabricated by the laser powder bed fusion (LPBF) process. Bending and torsional fatigue test specimens built horizontally (0°), inclined (45°), and vertically (90°) have been prepared and tested. Stress-relieving heat treatment was carried out to reduce the residual stresses. The 90°, 45°, and 0° built near-net-shape and polished specimens have fatigue strengths between 140 and 250 MPa under bending loading and 150 and 170 MPa under torsion loading. This difference illustrates a more pronounced defect sensitivity in bending compared to torsion. Fractographical analyses revealed the fatigue failure mechanisms. As the building direction inclines from vertical to horizontal, the effective areas of inherent defects diminish contributing to improving fatigue strength under bending loading whilst the differences from building directions in torsional fatigue strengths are minor. Microstructural features are seen to compete with inherent defects to affect fatigue performance in the condition that the effective defect sizes are close to the critical fatigue crack size." @default.
- W4313650227 created "2023-01-07" @default.
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- W4313650227 date "2023-05-01" @default.
- W4313650227 modified "2023-10-13" @default.
- W4313650227 title "Effects of building direction and loading mode on the high cycle fatigue strength of the laser powder bed fusion 316L" @default.
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- W4313650227 doi "https://doi.org/10.1016/j.ijfatigue.2023.107506" @default.
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