Modeling of The Effect of Non-Spherical Particles of Various Sizes Using Direct Laser Deposition (DLD)

Abstract

Additive manufacturing (AM) is the identical name to describe the new creation of manufacturing technology that built 3D objects by adding materials in layers, whether the material is in plastic, ceramics, metal and or it is advancing towards human tissues.AM can also be described as rapid manufacturing (RM). AM processes needs only few basic dimensional details, understanding of AM machines and building material that could be used to manufacture the part. Direct Laser deposition (DLD) is form of AM, a method that has a great possibility to reduce material waste through near net shape production in addition to increasing value to a previously manufactured pricey module (aviation and aerospace industry. Direct Laser deposition (DLD) process offers the potential to make a metallic component directly from CAD file. The focus of this study is an investigation of powder stream process, a sub process of DLD. Powder stream and processing parameters are highly important in clad formation, it directly affect powder distribution, temperature attenuation of beam and velocity during DLD. Various Modeling techniques have been used to model this sub process but in this work discrete element method using Lagrangian-Eulerain approach has been used and a review of analytical Modeling has been done. Effect of different processing parameters on clad height has been studied. The results of these investigations have also been validated with an experimental work.