Changing the alloy composition of Al7075 for better processability by selective laser melting

By M. Sistiaga, R. Mertens, B. Vrancken, Xiebin Wang, B. Hooreweder, Jean-Pierre Kruth, J. van Humbeeck. 2016

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Effects of Platform Pre-Heating and Thermal-Treatment Strategies on Properties of AlSi10Mg Alloy Processed by Selective Laser Melting (2018, background): “High-strength precipitation hardenable Al-Zn-Mg-Cu and Al-Cu-Mg-Si alloys offer large opportunities to achieve high mechanical performances, but their processability is often limited due to hot-cracking phenomena occurring during the last stages of the rapid solidification induced by SLM [6,7].”
Recent advances in hot tearing during casting of aluminium alloys (2020, background): “[116] reported that the addition of Si decreased the hot tearing susceptibility of AA7075 mainly because grain refinement occurred as the Si content increased.”
Improving additive manufacturing processability of hard-to-process overhanging structure by selective laser melting (2017, methodology): “A laser beam is used to selectively melt and solidify material in a powder-bed according to slices of corresponding 3D model, and the process repeats in a layer-bylayer manner until the product is finished (Sistiaga et al., 2016).”