Investigation on Porosity Content in 2024 Aluminum Alloy Welding by Yb:YAG Disk Laser

Abstract:

Aluminum alloy 2024 is extensively used in automotive and aerospace industries, but its application is limited due to the susceptibility to generate porosity during the welding process. Nevertheless, benefits from laser welding are clearly demonstrated. In addition, the use of a disk laser allows to obtain significant reduction in focus diameter and increased beam quality compared to traditional rod or slab lasers. The aim of the work is to discuss porosity formation as influenced by the thermal input provided, so bead-on-plate specimens in different conditions have been prepared. Porosity content is examined in relation to the fused zone extent and discussed considering interaction between laser and material. Higher thermal inputs are beneficial in full penetrative welds.

• Periodical: Advanced Materials Research (Volumes 383-390)
• Pages: 6265-6269
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.383-390.6265
• Online since: November 2011
• Authors: V. Alfieri, F. Cardaropoli, F. Caiazzo, V. Sergi
• Keywords: Aluminum (Al), Disk Laser, Laser Welding, Porosity

References

[1] A.D. Ludovico, G. Daurelio, L.A.C. De Filippis, A. Scialpi and F. Squeo: Laser welding of the AA 2024-T3 aluminium alloy by using two different laser sources, Proc of XV International Symposium on Gas Flow, Chemical Lasers and High Power Lasers, SPIE, Volume 5777 (2005).

DOI: 10.1117/12.611205

[2] A. Haboudou, P. Peyre, A.B. Vannes and G. Peix: Reduction of porosity content generated during Nd: YAG laser welding of A356 and AA5083 aluminium alloys, Materials Science and Engineering A, Volume 363 (2003), pp.40-52.

DOI: 10.1016/s0921-5093(03)00637-3

[3] J.K. Kim, H.S. Lim, J.H. Chao and C.H. Kim: Bead-on-plate weldability of Al 5052 alloy using a disk laser, Journal of Achievements in Materials and Manufacturing Engineering, Volume 28 (2008), Issue 2, pp.187-190.

[4] Aluminum and aluminum alloys (ASM International, Davis ed., USA, 1993).

[5] F. Malek Ghaini, M. Sheikhi, M.J. Torkamany, J. Sabbaghzadeh: The relation between liquation and solidification cracks in pulsed laser welding of 2024 aluminium alloy, Materials Science and Engineering A, Volume 519 (2009), pp.167-171.

DOI: 10.1016/j.msea.2009.04.056

[6] H. Zhao and T. Debroy: Macroporosity free aluminum alloy weldments through numerical simulation of keyhole mode laser welding, Journal of Applied Physics, Vol. 93 (2003), No. 12, pp.10089-10096.

DOI: 10.1063/1.1573732

[7] M. Pastor, H. Zhao, R.P. Martukanitz and T. Debroy: Porosity, underfill and magnesium loss during continuous wave Nd: YAG laser welding of thin plates of aluminum alloys 5182 and 5754, Welding Journal, Vol. 78 (1999), No. 12, pp.207-216.

DOI: 10.2351/1.521922

[8] F. Cardaropoli, V. Alfieri, F. Caiazzo, V. Sergi: Laser welding of aluminum alloy AA 2024 by Yb-YAG disk laser, to appear in Proc of X AITeM Conference, Enhancing the Science of Manufacturing (2011).

DOI: 10.4028/www.scientific.net/amr.383-390.6265

[9] B. Hu and I.M. Richardson: Autogenous laser keyhole welding of aluminum alloy 2024, Journal of Laser Applications, Volume 17 (2005), No. 2, pp.70-80.

DOI: 10.2351/1.1896964

[10] EN ISO 13919-2, Welding - Electron and laser beam welded joints - Guidance on quality levels for imperfections - Part 2: Aluminium and its weldable alloys (2003).

DOI: 10.3403/2380948

[11] W.M. Steen, Laser Material Processing, Springer, London (2003).