Benefits of very high feed rates for laser beam welding of AlMgSi aluminum alloys
Source abstract
Abstract
The present paper shows that laser beam welding of AA6016 aluminum sheets without filler wire but at high feed rates in the order of several tens of m/min is beneficial with respect to depth fluctuation, pores, and centerline cracks. Welds in the overlap configuration with a laser power of 16 kW (cw) at feed rates of 30 m/min and above were investigated. A comparably large laser beam diameter of 630 μm enabled welding at more than 50 m/min without humping. Full penetration and partial penetration welds were accomplished with depths of 2.4 and 2.0 mm, respectively, without pore formation. The partially penetrated welds show negligible local depth fluctuations in the range of only a few μm. Full penetration welds were performed at edge distances of 4, 5, and 6 mm without occurrence of centerline cracks. This constitutes a significant reduction of the critical zone for the formation of centerline cracks at the close edge position compared to conventional laser beam welding parameters.
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Research context
OpenAlex topics: Advanced Welding Techniques Analysis · Welding Techniques and Residual Stresses · Non-Destructive Testing Techniques
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Affiliations
Institut für Strahlwerkzeuge (IFSW), University of Stuttgart , Stuttgart, 70469, Germany
References (28)
Show source-provided references
1. Macroporosity free aluminum alloy weldments through numerical simulation of keyhole mode laser welding10.1063/1.1573732 ↗
2. Porosity, underfill and magnesium lose during continuous wave Nd:YAG laser welding of thin plates of aluminum alloys 5182 and 5754
3. Laser beam remote welding of aluminum hang-on parts
4. Understanding pore formation in laser beam welding10.1016/j.phpro.2011.03.031 ↗
5. Mechanisms of spiking and humping in keyhole welding10.1109/TCPMT.2011.2178412 ↗
6. Porosity formation mechanism and its prevention in laser welding10.1533/wint.2003.3138 ↗
7. Copper welds: The more the better?
8. A. Heider, “ Erweiterung der Prozessgrenzen beim Laserstrahlschweißen von Kupfer mit Einschweißtiefen von 1 bis 10 mm,” doctoral thesis (Universität Stuttgart, Stuttgart, Institut für Strahlwerkzeuge (IFSW) Stuttgart, 2018).
9. Laser welding of aluminium alloys: Problems, approaches for improvement and applications
10. R. M. Hilbinger, “ Heissrissbildung beim Schweißen von Aluminium in Blechrandlage,” doctoral thesis, Universität Bayreuth, Bayreuth, 2000.
11. P. Stritt, “ Prozessstrategien zur Vermeidung von Heißrissen beim Remote-Laserstrahlschweißen von AlMgSi 6016,” doctoral thesis, Universität Stuttgart, Stuttgart, Institut für Strahlwerkzeuge (IFSW), 2016.
12. New hot cracking criterion for laser welding in close-edge position
13. Application of the Rappaz-Drezet-Gremaud hot tearing criterion to welding of aluminium alloys
14. Temperature and stress behavior during close-edge laser welding10.1002/latj.201400035 ↗
15. Space and time resolved determination of thermomechanical deformation adjacent to the solidification zone during hot crack formation in laser welding
16. Strain sigantures associated to the formation of hot cracks during laser beam welding of aluminum alloys10.1016/j.optlaseng.2017.08.007 ↗
17. Remote laser welding of multi-alloy aluminium at close-edge position10.1016/j.phpro.2013.03.065 ↗
18. Fundamental research of 100 kW fiber laser welding technology
19. Welding of high thickness steel plates using a fiber coupled diode laser with 50 kW of output power
20. Advanced micro-welding strategies with pulsed Nd:YAG lasers
21. High-speed contour welding
22. Calculation of heat flow in welding
23. 1996
24. 2014
25. Theoretical approach to the humping phenomenon in welding processes10.1088/0022-3727/25/11/012 ↗
26. Aspects of keyhole/melt interaction in high-speed laser welding
27. Deep penetration welding with high power CO2 laser
28. Strahlwerkzeug Laser: Energieeinkopplung und Prozesseffektivität