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Material Design by Additive Manufacturing – impact of exposure-strategies and -parameters on material characteristics of AlSi10Mg processed by Selective Laser Melting

Thursday (09.11.2017)
14:20 - 14:40
Part of:

The metal processing Additive Manufacturing technology Selective Laser Melting “SLM” offers a high design freedom regarding the geometry as well as the processing of the material. The local application of a high energy laser source causes an exceptional microstructure, which can achieve better mechanical properties than conventionally manufactured equivalents. The material is created incrementally in sections and layers that are processed with different strategies and distinct parameter sets.

Designed materials can be generated by varying the manufacturing parameters and exposure strategy to induce a gradient or a local change of properties by forming the microstructure. Designed materials can also be created by changing the topology of the material on a micro-, meso-, macro- or even multiscale level. This enables the creation of material types like Functionally Graded Materials (FGM), Metamaterials or Structured Materials.

To produce such materials by SLM, it is necessary to gain a detailed understanding about the influence of the manufacturing parameters. Experimental studies have been carried out to investigate fuse rates and the exposure strategies. Based on the results parameter sheets has been derived, which support the process of finding optimized parameter sets for a specific purpose. General methods and their ability to influence the material structure and properties were tested and evaluated. Furthermore, the resulting change of the microstructure has been analyzed and first Graded Material were generated and tested to show the potential and possibilities to design a material on a multiscale level by Selective Laser Melting.

Aron Pfaff
Fraunhofer Institute for High-Speed Dynamics, Ernst-Mach-Institut - EMI


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