Abstract:
Improper selection of Laser Engineered Net Shaping (LENS) process parameters for the fabrication of
cobalt‑chromium‑molybdenum (CoCrMo) alloy may result in poor quality components for dental implant ap
plications. To solve the LENS fabrication challenge, this work utilizes response surface methodology (RSM) to
investigate the influence of LENS deposition variables on the microstructural and mechanical performance of the
manufactured samples for dental implant applications. Analysis of statistical data demonstrated that micro
hardness and porosity were both significantly influenced by laser scan speed and powder feed rate, while surface
roughness is impacted substantially by laser scan speed and laser power. The analysis of the responses revealed
that the optimum factors were at a scan speed of 5.3 mms
1
, powder feed rate of 4.748 gmin
of 386.896 W to give surface roughness, porosity, and microhardness responses of 8.7775
1
μ
and laser power
m, 0.06 %, and
387.4286 HV, respectively. The models revealed a strong interaction between the actual experimental data and
RSM-predicted responses. The results of this research can serve as a guide for determining suitable LENS input
factors for the manufacture of dental implants.
