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Effect of hot isostatic pressing on the critical defect size distribution in AlSi7Mg0.6 alloy obtained by selective laser melting

Article dans une revue avec comité de lecture
Author
BONNERIC, Matthieu
417643 IRT Saint Exupéry - Institut de Recherche Technologique
164351 Institut de Mécanique et d'Ingénierie de Bordeaux [I2M]
BRUGGER, Charles
164351 Institut de Mécanique et d'Ingénierie de Bordeaux [I2M]
SAINTIER, Nicolas
164351 Institut de Mécanique et d'Ingénierie de Bordeaux [I2M]

URI
http://hdl.handle.net/10985/19160
DOI
10.1016/j.ijfatigue.2020.105797
Date
2020
Journal
International Journal of Fatigue

Abstract

This study focuses on the influence of defect density on the sizes of the critical defects responsible for fatigue failure in AlSi7Mg0.6 alloy produced by Selective Laser Melting. Samples having similar microstructures and different defect densities were obtained combining Hot Isostatic Pressing and T6 treatments. Defect populations were analyzed using X-ray tomography, and fatigue tests were performed to determine the critical defect distributions. A method allowing for the prediction of these distributions from the CT scan data was then proposed, and discussed with regard to the actual distributions obtained from the fatigue tests.

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