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Publisher DOI: 10.1016/j.phpro.2016.08.096
Title: Influence of process parameters on the quality of aluminium alloy en AW 7075 using Selective Laser Melting (SLM)
Language: English
Authors: Kaufmann, Niko 
Imran, Muhammad 
Wischeropp, Tim Marten 
Emmelmann, Claus 
Siddique, Shafaqat 
Walther, Frank 
Keywords: EN AW 7075;aluminium alloy;hot cracks;relative density;selective laser melting (SLM)
Issue Date: 2016
Publisher: Elsevier
Source: Physics Procedia (83): 918-926 (2016-01-01)
Journal or Series Name: Physics procedia 
Abstract (english): 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.
Conference: 9th International Conference on Photonic Technologies - LANE 2016 
DOI: 10.15480/882.1973
ISSN: 1875-3892
Institute: Laser- und Anlagensystemtechnik G-2 
Type: (wissenschaftlicher) Artikel
License: CC BY-NC-ND 4.0 (Attribution-NonCommercial-NoDerivatives) CC BY-NC-ND 4.0 (Attribution-NonCommercial-NoDerivatives)
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