Additive Manufacturing (AM) is a technique to repeat layering of material in order to create structural components. Selective Laser Sintering (SLS) and Selective Laser Melting (SLM) are two excellent ways in the art. As to fabricate a targeted object, a powder is deposited onto a work surface first. Then, laser irradiated the powder and molten or sintered layer by layer to form the object.
In the process of Selective Laser Melting, the solidification is restricted by the optimized parameters to get the fully dense object. Thus the material microstructure and property is difficult to be optionally controlled in the object. Therefore, it is in need to develop a new technique to control the selective powder melting/sintering process.