Thermal post-processing of AlSi10Mg parts produced by Selective Laser Melting using recycled powder

By A. Maamoun, M. Elbestawi, G. Dosbaeva, Stephen C. Veldhuis. 2018

273 citations recorded by the source corpus.

Abstract The performance enhancement of parts produced using Selective Laser Melting (SLM) is an important goal for various industrial applications. In order to achieve this goal, obtaining a homogeneous microstructure and eliminating material defects within the fabricated parts are important research issues. The objective of this experimental study is to evaluate the effect of thermal post-processing of AlSi10Mg parts, using recycled powder, with the aim of improving the microstructure homogeneity of the as-built parts. This work is essential for the cost-effective additive manufacturing (AM) of metal optics and optomechanical systems. To achieve this goal, a full characterization of fresh and recycled powder was performed, in addition to a microstructure assessment of the as-built fabricated samples. Annealing, solution heat treatment (SHT) and T6 heat treatment (T6 HT) were applied under different processing conditions. The results demonstrated an improvement in microstructure homogeneity after thermal post-processing under specific conditions of SHT and T6 HT. A micro-hardness map was developed to assist in the selection of the optimized post-processing parameters in order to satisfy the design requirements of the part.

Subfields: Automotive Engineering, Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/3c6cab1420f96d5d6b1838ef97f93fe8a656f306

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In Mechanical Engineering

Citations in the corpus

3D printing of Aluminium alloys: Additive Manufacturing of Aluminium alloys using selective laser melting (2019, background): “The solidification mechanism in SLM AlSi10Mg and AlSi12 is cellular-dendritic.”
Effects of Platform Pre-Heating and Thermal-Treatment Strategies on Properties of AlSi10Mg Alloy Processed by Selective Laser Melting (2018, background): “Maamoun and co-workers [21] published a research study on thermal post-processing of AlSi10Mg alloy after SLM, and supplied conclusive suggestions in the form of a microstructure/microhardness map on possible options for post-processing treatments.”