Influence of Selective Laser Melting Process Parameters on Impact Resistance of Lattice Structure made from AlSi10Mg

摘要

Selective Laser Melting (SLM) is one of metal additive technologies (AT) which allows manufacturing of components with very complex shape. One of the perspective examples, difficult to make by other technologies, are lattice structures. Lightweight components with good mechanical properties can be created due to AT. This study describes the influence of SLM process parameters such as laser power and laser scanning speed on the impact resistance of lattice structures with body centered cubic (BCC) unit cells. Wide range of process parameters with laser power of 100 W – 400 W and laser scanning speed of 1000 – 4000 mm/s were explored to determine the optimum set up for fabrication of lattice structures. The as-fabricated truss size, morphology and internal porosity were investigated using X-ray micro tomography (mCT). Samples for mechanical testing were tested using drop-weight impact tester to compare absorbed energy for standard process parameters and new parameters. Result from impact testing were correlated with set up process parameters of SLM technology.