Influence of process parameters on the quality of aluminium alloy en AW 7075 using Selective Laser Melting (SLM)
Citation Link: https://doi.org/10.15480/882.1973
Publikationstyp
Journal Article
Date Issued
2016-09-16
Sprache
English
TORE-DOI
Journal
Volume
83
Start Page
918
End Page
926
Citation
Physics Procedia (83): 918-926 (2016)
Contribution to Conference
Publisher DOI
Scopus ID
Publisher
Elsevier
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.
Subjects
EN AW 7075
aluminium alloy
hot cracks
relative density
selective laser melting (SLM)
DDC Class
600: Technik