Abstract
Laser Powder Bed Fusion (L-PBF) is a popular technique for making intricate parts in various fields. Assessing the load-bearing capacity of components fabricated through L-PBF technique is crucial for broadening their applications across various industrial sectors. While prior research has primarily concentrated on static loads, cyclic loading is critical in real-world engineering applications. The purpose of this study is to investigate the influence of T6 heat treatment on the very high cycle fatigue (VHCF) performance of AlSi7Mg alloy fabricated using L-PBF technique by considering microstructural alteration and defect statistics. This study shows that the investigated heat treatment reduced VHCF response of the alloy. This is attributed to increased hydrogen and oxide porosity in conjunction with their increased diametral sizes along with microstructural alteration. The obtained results bring us closer to better understand and improve the use of the AlSi7Mg alloy in additive manufacturing. This offers a viable option for industries looking to benefit from the advantages of the L-PBF technique for manufacturing components.
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