Selective Laser Melting Process: A Review Paper

Anshul Yadav, Nirma Kumari, Saurabh Babu, Swati Gupta

Abstract


Selective Laser Melting (SLM) is special among other Additive Manufacturing (AM) processes due to its flexibility of materials used, and the ability to create functional components, which have their mechanical properties comparable to those properties of bulk materials. The SLM process begins by slicing a 3D-CAD model into a number of layers. For each sliced layer the laser scan path is calculated which defines both boundary contours and form of the fill sequence which is often a raster pattern. Each of these layers is sequentially created by depositing powder on top of the previous layer, and melting the surface by scanning a laser beam. A high power-density fibre laser melts the powder layer. The melted particles fuse and solidify to form a layer of the component. During this process, successive layers of powder (metal) are melted completely and consolidated on top of each other by the energy of a high intensity laser beam. In this review, an attempt has been made to provide the recent developments in the field of SLM in terms of heat transfer, Mechanical Properties and many other aspects.

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References


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