|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Additive Manufacturing: Building the Pathway towards Process and Material Qualification
||Oxide, Porosity and Fatigue Performance of AlSi10Mg Parts Produced by Selective Laser Melting
||Ming Tang, Petrus Christiaan Pistorius
|On-Site Speaker (Planned)
For conventional cast aluminum alloys, the fatigue behavior of castings are largely determined by the internal defects, particularly pores and inclusions, such as oxides. In the current study, such imperfections are also present in AlSi10Mg parts produced by selective laser melting, and serve as sites to initiate fatigue cracks. Scanning electron microscopy with automatic feature analysis was applied to examine typical defects and quantify defect content, shape, average size and size distribution from last solidified surface, internal cross-section and fracture surface. Current result shows that oxides mainly come from oxide film of gas-atomized aluminum powder, and remains as thick alumina particles and thin film in final products. The oxide-driven pores dominate the fatigue resistance of the product, and area fraction of such pores can be regarded as an indication to predict fatigue performance.
||Planned: A print-only volume