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Direct metal laser sintering (DMLS) is similar to selective laser melting as the intent is to use a laser with high power density to create the geometry that is best suited for manufacturing metals and metal alloys. DMLS uses a variety of alloys for allowing efficient hardware to design complex geometries. The functional prototypes made using this method have greater strength and ultimate durability. DMLS is most suitable for fabricating complex oil and inert gas components. Metal alloys such as aluminum alloys, stainless steel and niche alloys are widely used (Rizzuti 2019). DMLS materials are completely dense, highly robust and have greater resistance to corrosion, which can be auxiliary treated with heat, sterilization and coating.

Figure 1.6. Direct metal laser sintering process (Marrey 2019). For a color version of this figure, see www.iste.co.uk/kumar/materials.zip