Audi Toolmaking used a metal selective laser sintering process to create an accurate half-scale replica of their classic Auto Union Typ C Grand Prix car. The material used was an extremely fine powder consisting of metal grains about 15 to 40 thousandths of a millimeter, which was fused together using a selective laser sintering process. By successfully 3D printing all of the metal parts used for the fabrication of the replica was the first large-scale demonstration of Audi Toolmaking’s metal additive manufacturing capabilities, and the Volkswagen Group is exploring new ways to use the technology. You can find out more about this 3D printed replica race car over on 3DPrint.com: http://3dprint.com/104280/3d-print-a...cecar-replica/