Graz University of Technology (TU Graz) in Austria has develop a new technology by using LED instead of laser as light sources to make metal component by 3D printing. The research project is named Selective LED-based Melting (SLEDM). SLEDM uses high-power LEDs as light source to melt metal powder for 3D printing manufacturing. The technology is similar to selective laser melting (SLM) and electron beam melting (EBM), in which metal powder is melted by means of a laser or electron beam and built up into a component layer by layer. However, by replacin...