Study on Elements Distribution of Al-Base Alloy’s Weld by Laser Welding with Filler Material

Abstract:

To figure out the elements distribution in the seams, laser welding was carried out on the Al plates which coating with Si powder and Cu powder respectively, then electronic probe was used to analyze the microstructure in the section of the seams. Results indicated that alloying elements distribution in the weld is heterogeneous under the metal liquid movement in welding pool and the elemental diffusion co-functioning. There are two high concentration regions on both sides of the weld centerline, the content at the center is low, slightly higher and more homogeneous at the bottom. The distribution of the alloy composition in the weld is related to the specific gravity of the alloying elements. Though the specific gravity of Si and aluminum matrix is similar, it can flow with the liquid metal in the pool, so the concentration changes of Si in the weld are larger. Elemental fluctuation keeps steady in the weld joint.

• Periodical: Applied Mechanics and Materials (Volumes 121-126)
• Pages: 411-417
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.121-126.411
• Online since: October 2011
• Authors: An Guo Huang, Shu Hui Hu, Zhi Yuan Li, Yong Yang Wang
• Keywords: Al Base Alloys, Elements Distribution, Filler Material, Laser Welding

References

[1] Z. Sun, M. Kuo: Bridging the Joint Gap with Wire Feed Laser Welding. Journal of Materials Processing Technology. Vol. 87(1999), pp.213-221.

DOI: 10.1016/s0924-0136(98)00346-x

[2] S. Salminen: The Effects of Filler Wire Feed on the Efficiency of Laser Welding. Proceedings of the SPIE2003, Osaka, Japan. Vol. 4831(2003), pp.263-268.

[3] W. Duley: Laser processing and analysis of materials. (Plenum Press, New York 1993).

[4] S. Salminen, V. P. Kujanpaa and T. I. J. Moisio: Beam-wire Interactions during Laser Welding with Filler Wire. Welding Journal. Vol. 75(1996), pp.9-13.

[5] U. Dilthey, D. Fuest and W. Scheller: Laser Welding with Filler Wire. Optical and Quantum Electronics. Vol. 27(1995), pp.1181-1191.

[6] M. H. Cho, D. Farson: Laser weld keyhole dynamics. ASM proceedings of the International Conference, Trends in Welding Research (2002), pp.112-117.

[7] Ready J F: Effects of high power laser radiation. (Academic Press, New York 1971).

[8] Xiao, RS: in: Conference on Lasers in Material Processing and Manufacturing III，edited by Deng, SS/SPIE-INT Soc Optical Engineering, Beijing, China(2007).