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Bartkowiak K.,Friedrich - Alexander - University, Erlangen - Nuremberg | Bartkowiak K.,Advanced Materials and Processes | Ullrich S.,Friedrich - Alexander - University, Erlangen - Nuremberg | Ullrich S.,Advanced Materials and Processes | And 4 more authors.
Physics Procedia | Year: 2011

The significance of this research lies in its potential to create an Additive Manufacturing technology of novel lightweight materials for industrial applications. The work reported here focuses on studies performed with low power fiber laser and investigates the feasibility of introducing high strength aluminium alloys and custom developed Al powder systems to the Selective Laser Melting (SLM) process. Al-Si powder alloys were used as a reference point. The understanding of the behaviour the investigated alloys is essential if the SLM process to be fully controlled for a manufacturing environment. © 2011 Published by Elsevier Ltd.

Plettke R.,Friedrich - Alexander - University, Erlangen - Nuremberg | Schaub A.,Friedrich - Alexander - University, Erlangen - Nuremberg | Groschel C.,Friedrich - Alexander - University, Erlangen - Nuremberg | Scheitler C.,SAOT Erlangen Graduate School in Advanced Optical Technologies | And 6 more authors.
Key Engineering Materials | Year: 2014

Mixed-Materials parts have great light-weight potential for the automotive application to reduce the carbon footprint. But the joining of fibre composite plastic sheets to metal sheets is in practical application limited to adhesive bonding or mechanical joining with additional fastener elements due to the large differences in physical properties. A new process chain based on plastic joining without fastener elements is proposed and first results on the mechanism and on the achievable strength of the new joints are shown. The process chain consists of three steps: First joining pins are added to the sheet metal by an additive manufacturing process. In a second step these pins are pierced through the fibre composite sheet with a local heating of the thermoplastic in an overlap setup. In the third and last step the joint is created by forming the pins with the upsetting process to create a shape lock. The shear strength of the joined specimens was tested in a tensile testing machine. The paper shows that even with a non-optimized initial setup joints can be realised and that the new process chain is a possible alternative to adhesive bonding. © 2014 Trans Tech Publications, Switzerland.

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