Influence of Process Parameters on the Quality of Aluminium Alloy EN AW 7075 Using Selective Laser Melting (SLM)

By N. Kaufmann, M. Imran, T. Wischeropp, C. Emmelmann, S. Siddique, F. Walther. 2016

267 citations recorded by the source corpus.

Abstract Selective laser melting (SLM) is an additive manufacturing process, forming the desired geometry by selective layer fusion of powder material. Unlike conventional manufacturing processes, highly complex parts can be manufactured with high accuracy and little post processing. Currently, different steel, aluminium, titanium and nickel-based alloys have been successfully processed; however, high strength aluminium alloy EN AW 7075 has not been processed with satisfying quality. The main focus of the investigation is to develop the SLM process for the wide used aluminium alloy EN AW 7075. Before process development, the gas-atomized powder material was characterized in terms of statistical distribution: size and shape. A wide range of process parameters were selected to optimize the process in terms of optimum volume density. The investigations resulted in a relative density of over 99%. However, all laser-melted parts exhibit hot cracks which typically appear in aluminium alloy EN AW 7075 during the welding process. Furthermore the influence of processing parameters on the chemical composition of the selected alloy was determined.

Subfields: Automotive Engineering, Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/7cb361f0b789ceb6ba0666f06fddb296f62da724

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Citations in the corpus

The Advancement of 7XXX Series Aluminum Alloys for Aircraft Structures: A Review (2021, methodology): “[60] studied the influence of SLM process parameters on the forming quality of Al 7075 alloy, and finally obtained a sample with a density greater than 99% by optimizing the parameters.”
A Novel Strategy to Additively Manufacture 7075 Aluminium Alloy With Selective Laser Melting (2021, background): “Thermo-physical properties of materials [1-5].”