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.

中文翻译：

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热等静压对选择性激光熔化AlSi7Mg0.6合金临界缺陷尺寸分布的影响

摘要 本研究的重点是缺陷密度对选择性激光熔化生产的AlSi7Mg0.6合金疲劳失效的关键缺陷尺寸的影响。结合热等静压和 T6 处理获得具有相似微观结构和不同缺陷密度的样品。使用 X 射线断层扫描对缺陷群进行分析，并进行疲劳测试以确定关键缺陷分布。然后提出了一种允许从 CT 扫描数据预测这些分布的方法，并针对从疲劳测试中获得的实际分布进行了讨论。