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Optimizing pulsed fiber laser welding process parameters of thin Ti6Al4V sheet to control angular distortion
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Optimizing pulsed fiber laser welding process parameters of thin Ti6Al4V sheet to control angular distortion
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Journal Article
Optimizing pulsed fiber laser welding process parameters of thin Ti6Al4V sheet to control angular distortion
2019
Overview
The present study deals with angular distortions generated in fiber laser welding of Ti6Al4V sheets performed utilizing pulsed mode of laser irradiations. Experiments were conducted considering laser power, scan speed, pulse frequency and duty cycle as input process parameters, and angular distortion measured in terms of out of plane bending was taken as the process output. A central composite design was employed for carrying out pulsed laser welding experiments. The angular distortion was modelled using the response surface methodology for correlating with the input process parameters. Angular distortion was observed to increase with the laser power and scan speed. Optimum values of laser pulse frequency and duty cycle were found for obtaining least angular distortion. The prediction accuracy of the developed model of angular distortion was found to be good. Then, the desirability function approach of optimization technique was used to determine the optimum process parameters for obtaining the minimum distortion. Optimal distortion value was verified by conducting experiments and results were found satisfactory.
Publisher
IOP Publishing
