Laser PBF (LPBF), which is selective laser sintering (SLS) and selective laser melting (SLM), traces its origin back to 1986, when Carl Deckard, a master student at the University of Texas, filed a patent on this process, which was granted in 1989. The term “laser” in SLS and SLM implies that a laser is used for processing; the term “sintering” implies that powders are involved in the process. It infers that powder processing is done by the laser, which is used as a point heat source. “Selective” implies that all powders are not processed by the laser simultaneously, i.e., powders are processed selectively when and where required. In conventional sintering, all powders are processed simultaneously. “Melting” refers to a particular case of powder processing in which powders are completely melted. Thus, SLM refers to a case in which full melting occurs.