The Effect of DMLS (Direct Metal Laser Sintering) Additive Manufacturing Laser Power and Laser Speed on Part Surface Finish
Date
2020-12
Authors
Cwik, Aaron
Major Professor
Advisor
Agba, Emmanuel
Committee Member
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Abstract
This research project intended to determine the effect of changing the laser power and laser speed on 17-4 stainless steel parts produced using direct metal laser sintering 3D metal printing technology. The surface roughness and hardness of multiple surfaces on test parts was examined. The surfaces analyzed included horizontal, vertical, and a slanted surface on which multiple combinations of laser power and speed were considered. Some of the changed settings resulted in the test part retaining approximately the same amount of energy per area of the produced part during sintering while others varied. The data appears to show a fairly benign effect of changing the aforementioned parameters although relationships and effects of changing these independent variables still do show some interaction. Increasing laser speed seems to lead to an increase in roughness on the horizontal, upper surface of the test part while increasing power seems to decrease the surface roughness. On other surfaces analyzed, there is not a significant effect. Hardness of both surfaces analyzed appears to increase as power increases and decrease as laser speed increases.
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