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Selective laser melting (SLM) uses a high-power density laser to melt the raw material and fuse it together with metallic powders, which is mainly used for low-volume materials. In this technique, various materials such as glass, ceramics and plastics are used. The laser beam will heat the particles at appropriate positions on a bed of metallic powder until it is completely smelted. The AM machine will consecutively increase the melted layers over the metal bed until it reaches the expected design (Jürgen 2017). Its common applications can be found in aerospace industries, automobile industries and medical industry to overcome the demand for human organs.

Figure 1.5. Selective laser melting (Mumtaz 2008). For a color version of this figure, see www.iste.co.uk/kumar/materials.zip