Analysis of the Static Mechanical Properties of Iron-Based Alloys deposited by Extreme High-Speed Laser Material Deposition for Additive Manufacturingor Repair Applications

Abstract

(INGLÉS) The objective of the following work is to analyze the feasibility of extreme high-speed laser material deposition advanced manufacturing process (EHLA) for the repair of E355 steel components. The verification is carried out by the deposition of materials in powder form with similar mechanical properties to the steel base. The selected powder materials to be deposited are low carbon AISI 430L ferritic stainless steel, heat treatable and low alloy steel AISI 4340 and case hardening steel 16MnCr5. A series of experiments are conducted in order to achieve the best-adapted combination of process parameters (laser power, mass flow of powder, speed of rotation of the piece and feed forward of the contribution among others) to achieve a low porosity, defect-free bonding and crack-free for the deposition of consecutive layers with a final thickness of 10 mm. Tensile specimens are sampled from repaired layers to analyze the static mechanical properties to evaluate whether the repair by these materials meet the quality requirement.