4.6 Article

Effect of Internal Defects on the Fatigue Behavior of Additive Manufactured Metal Components: A Comparison between Ti6Al4V and Inconel 718

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Relationship between internal defect size and fatigue limit in selective laser melted Inconel 718

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Summary: Inconel 718 is a high-temperature alloy with excellent mechanical properties, but internal defects during manufacturing may affect its fatigue strength. The study found that Inconel 718 specimens fabricated by SLM with internal defects of approximately 400 microns in diameter showed no significant decrease in fatigue strength. The predicted fatigue limit for the flat specimens was 40% higher than the experimental results.

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