Reducing porosity in AlSi10Mg parts processed by selective laser melting

By N. Aboulkhair, N. Everitt, Ian Ashcroft, Christopher John Tuck. 2014

1,313 citations recorded by the source corpus.

Selective laser melting (SLM) is widely gaining popularity as an alternative manufacturing technique for complex and customized parts. SLM is a near net shape process with minimal post processing machining required dependent upon final application. The fact that SLM produces little waste and enables more optimal designs also raises opportunities for environmental advantages. The use of aluminium (Al) alloys in SLM is still quite limited due to difficulties in processing that result in parts with high degrees of porosity. However, Al alloys are favoured in many high-end applications for their exceptional strength and stiffness to weight ratio meaning that they are extensively used in the automotive and aerospace industries. This study investigates the windows of parameters required to produce high density parts from AlSi10Mg alloy using selective laser melting. A compromise between the different parameters and scan strategies was achieved and used to produce parts achieving a density of 99.8%.

Subfields: Automotive Engineering, Industrial and Manufacturing Engineering, Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/1028d5ebeb9255c743a67df3a4cf42bcbe656802

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Citations in the corpus

3D printing of Aluminium alloys: Additive Manufacturing of Aluminium alloys using selective laser melting (2019, methodology): “When processing Al alloys, it is advised to use slower scan speeds [32,34,87] with high laser powers [105] for better densification.”
Improving the fatigue behaviour of a selectively laser melted aluminium alloy: Influence of heat treatment and surface quality (2016, methodology): “The microstructure of the as-built material is divided into three zones; namely, melt pool core, melt pool boundary, and heat affected zone [17, 22].”
A Review of Metal Additive Manufacturing Technologies (2018, background): “Many investigations were performed to find the process parameters required to produce high dense aluminum AlSi10Mg (UNS A03600) parts by SLM [88, 89].”