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Processing aluminium EN AW 7075 alloy using selective laser meltingNejc Velikajne,
Jože Medved,
Matjaž Godec,
Irena Paulin, complete scientific database of research data
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 designed and manufactured with high accuracy and little post processing. Currently, different types of 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 a new alloy which is more suitable for the SLM process for the wide used aluminium alloy EN AW 7075. But before that, gas-atomized powder material was characterized in terms of statistical distribution. A wide range of process parameters and different pre-heating temperatures were selected to optimize the process in terms of optimum volume density and reducing the effect of hot cracking. However, all laser-melted parts exhibited hot cracks which typically appear in aluminium alloy EN AW 7075.
Keywords: EN AW 7075, aluminium alloy, hot cracks, relative density, selective laser melting (SLM)
Published in DiRROS: 22.04.2024; Views: 51; Downloads: 0
