Effect of process parameters on pulsed laser welding of AA5083 alloy using response surface methodology and pulse shape variation

Aluminium alloys exhibit eco-friendly aspects related to global environmental issues, such as almost unlimited recyclability. Nevertheless, some intrinsic characteristics are challenges to explore all their benefits. In the welding process, the high thermal conductivity and low melt point require hi...

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Bibliographic Details
Published in:International journal of advanced manufacturing technology 2022-06, Vol.120 (7-8), p.4635-4646
Main Authors: Chludzinski, Mariane, dos Santos, Rafael Eugenio, Churiaque, Cristina, Ortega-Iguña, Marta, Sánchez-Amaya, Jose Maria
Format: Article
Language:English
Subjects:
Alloys
Aluminum base alloys
CAE) and Design
Computer-Aided Engineering (CAD
Engineering
Industrial and Production Engineering
Laser beam welding
Laser modes
Lasers
Mechanical Engineering
Media Management
Metal sheets
Original Article
Penetration depth
Process parameters
Pulse duration
Pulse shape
Pulsed lasers
Recyclability
Response surface methodology
Spot welds
Statistical methods
Thermal conductivity
Welding parameters
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Summary:Aluminium alloys exhibit eco-friendly aspects related to global environmental issues, such as almost unlimited recyclability. Nevertheless, some intrinsic characteristics are challenges to explore all their benefits. In the welding process, the high thermal conductivity and low melt point require high control of heat input. Alternatively, the pulsed laser mode provides a sharp beam focus with precise control enabling regulating the energy delivered. In this sense, this present work analysed the effect of pulsed laser welding parameters on 3-mm-thick AA5083 aluminium alloy sheets. Trials targeted to develop sound welds with minimum defect and high penetration depth adopting statistical methods. The optimum parameter arrangement was achieved by varying peak power, spot diameter, and pulse duration. Finally, the best parameter combination was applied using different pulse shapes to mitigate crack formation and pores. As a result, the pulse shape with step-down at the end of each pulse generated crack-free spot welds.
ISSN:0268-3768
1433-3015
DOI:10.1007/s00170-022-09028-z