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- W3047502452 endingPage "109042" @default.
- W3047502452 startingPage "109042" @default.
- W3047502452 abstract "Creep performance of additively-manufactured components is strongly related to additive manufacturing process-induced microstructures and loading direction. Here, the creep life and the cracking behavior of Inconel 718 fabricated by selective laser melting were investigated systematically at 650°C and 400 N by means of the small punch creep testing method. The results show that the periodic and spatially heterogeneous microstructures composed of V-shaped grains and columnar grains are produced, and play an important role in the creep performance. Under the same heat-treatment condition, the creep resistance of the specimens loaded along the scanning direction is much higher than that of the ones loaded along the building direction. While under the same loading direction, homogenization/aging-treated specimens have the longest creep life and the solution/aging-treated specimens are of the shortest creep life. The creep cracking mechanism of the alloy associated with the spatially heterogeneous microstructures was elucidated. The theoretical calculation suggests that the higher energy input or the larger overlap ratio of the melting pools may decrease the area fraction of the V-shaped grains to enhance the creep life. The finding provides a potential strategy to design microstructures for the high creep performance of selective laser melting-fabricated Inconel 718." @default.
- W3047502452 created "2020-08-10" @default.
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- W3047502452 date "2020-10-01" @default.
- W3047502452 modified "2023-10-17" @default.
- W3047502452 title "Small punch creep performance of heterogeneous microstructure dominated Inconel 718 fabricated by selective laser melting" @default.
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- W3047502452 doi "https://doi.org/10.1016/j.matdes.2020.109042" @default.
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