In this work,two types of CP Ti cubes with similar volumetric energy densities(VED)but different process parameters were produced using laser powder bed fusion(LPBF)method.The corrosion behavior of the fabricated specimens was investigated by conducting electrochemical impedance spectroscopy(EIS)and polarization experiments in simulated body fluid(SBF)solution at 37℃.The results indicated that the microstructure and porosities,which are of great importance for biomedi-cal applications,can be controlled by changing the process parameters even under constant energy densities.The sample produced with a lower laser power(E1)was featured with a higher level of porosity and thinner alpha laths,as compared with the sample fabricated with a higher laser power(E2).Moreover,results obtained from the bioactivity tests revealed that the sample produced with a higher laser power conferred a slight improvement in the bioactivity due to the higher amount of porosity.Lower laser power and hence higher porosity level promoted the formation of bone-like apatite on the surface of the printed specimens.The potentiodynamic polarization tests revealed inferior corrosion resistance for the fabricated sample with higher porosity.Moreover,the EIS results after different immersion times indicated that a stable oxide film was formed on the surface of samples for all immersion times.After 1 and 3 days of immersion,superior passivation behavior was observed for the sample fabricated with lower laser power.However,very similar impedance and phase values were observed for all the samples after 14 days of immersion.

Mohammad Hossein Mosallanejad;Saber Sanaei;Masoud Atapour;Behzad Niroumand;Luca luliano;Abdollah Saboori

Department of Materials Engineering,Isfahan University of Technology,84156-83111 Isfahan,Iran;Department of Applied Science and Technology,Politecnico di Torino,Corso Duca Degli Abruzzi 24,10129 Torino,Italy;Department of Management and Production Engineering,Politecnico di Torino,Corso Duca Degli Abruzzi 24,10129 Torino,Italy

金属学报（英文版）

[1]Mohammad Hossein Mosallanejad;Saber Sanaei;Masoud Atapour;Behzad Niroumand;Luca luliano;Abdollah Saboori-.Microstructure and Corrosion Properties of CP-Ti Processed by Laser Powder Bed Fusion under Similar Energy Densities)[J].金属学报（英文版）,2022(09):1453-1464

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