Surface finishing by laser re-melting applied to robotized laser metal deposition

Low surface quality of as-deposited laser metal deposition (LMD) parts is one the main drawbacks this additive manufacturing technology that prevents direct use without implementation costly and time consuming post-processes. An in-process finishing operation need auxiliary equipment highly appealing to overcome such issues. For reason, re-melting performed with same used for process a promising capable redistributing deposited material onto smoother surface. Combined robotic manipulation system both LMD phases, complex geometries can potentially be produced in near net-shape conditions. important issue concerning development regards standardized roughness waviness parameters, which fail address texture specific process. Indeed, produce new formation under non-optimal Hence, an analysis topography frequency domain along standard parameters would more appropriate. In work, applied AISI 316L thin walled structures right after experimental campaign aimed at finding strategy improving was carried out. Areal profile measurements were characterizing effect parameters. The power spectrum on S-F calculated point out presence periodical components structure transfer function calculation define improvement compared acquired areal data assessed two different spatial regions corresponding S-L L-F surfaces. arithmetic average filtered calculate Sa, SF LF analogously linear respectively. Results showed, optimized conditions, reduction up 79% related range. On other hand, parameter realted range reduced 58% due low effectiveness reducing amplitude lowest components. overall terms capability evaluated as mean ± 3 times sample deviation values (µ±3σ). could from 10.35±0.42 µm 1.92±0.11 9.57±0.48 4.04±0.20 µm.