| Additive manufacturing is also referred as the "third industrial revolution", because it allows cost-effective mass production of complex shapes, those are costly and complicated to fabricate using conventional manufacturing methods. The quality of the fabricated part depends on the method used more, than on the skills of the user. Because it allows complex parts to be manufactured in one piece, flaws with line balancing and production bottlenecks will not be an affecting factor.Massive efforts have been given to study temperature profile, in laser additive manufacturing, due to the total dependence of the quality of the products on the thermal history applied during the process, since the mechanical depend on the thermal history profile. The results that have been obtained from the works can be summarized as:Using simulation finite element program, and by apply physics, the temperature distribution and the thermal load applied on the part produced through laser additive manufacturing, totally production procedure applied during the production. Deeply understanding of the heat extracted out of the part, is geometric dependent, the geometrics of the part play important role on the temperature gradient, so the part under process, its geometry will change as the process proceed, which means the heat profile and the temperature distribution keeps changing, during the same process. The mechanical properties of the part produce by laser additive manufacturing, affected by the slicing method for the layers deposition. For the part produced by fixed offset distant, the high side experienced the most heat load during the production process, which may lead to introduce residual stresses or dislocations. For the linearly varied offset distant, the low side experienced the high heat load, and the substrate play main role as heat sink. Though experiment, which gives more realistic results that match the simulation works. |
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