Experimental Analysis of Porosity Formation in Laser-assisted Powder Deposition Process
نویسندگان
چکیده
Pore formation remains a concern in the area of rapid manufacturing by the Laser Engineered Net Shaping (LENS) process. Results usually conflict on the origin of these pores; whether it should stem from an effect due to the physical/mechanical properties of the material or from an effect purely related to the processing parameters. We investigated this problem spanning a range of process parameters for the AISI 316L grade stainless steel. The volume fraction, number density, and size distribution of pores were quantified using X-Ray Computed Tomography (XRCT). Pores formed both at the interface between adjacent layers and within the bulk of the layer. They were systematically sensitive to both the powder material composition and process parameters.
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