Abstract
Powder bed fusion is an additive manufacturing technology used to create functional industrial parts and complex 3D geometries, layer by layer, which are not feasible using traditional manufacturing techniques. This processing technique involves spreading a thin layer of powder over the build platform and selectively heating the powder using a heat source or laser to adhere the powders together. This process is repeated for each subsequent layer of powder to form the final product, thus eliminating the need for any complex tooling or fixtures. This chapter discusses the various commonly used powder bed manufacturing methods used in the industries such as selective laser sintering, selective laser melting, selective heat sintering, and direct metal laser sintering. These powder bed fusion techniques can cater to a wide range of materials, including polymers, composites, metals, and their alloys. The choice of the manufacturing method, material composition, process parameters, and post-treatment can offer customized and enhanced properties to these 3D-printed materials. In this chapter, the basic principle and operation of each method, the impact of their process parameters on obtained material properties, and recent applications of the powder bed processes are discussed.
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