Microstructure Features of Aluminum Alloys Welded Joint Obtained by Friction Stir Welding

Abstract:

The paper presents a metallographic study of aluminum alloy welds produced by friction stir welding. The weld structure is described for two alloys: Al-Cu and Al-Mg. It is shown that friction stir welding provides a fine-grained structure of the weld. The phase composition of the weld metal for the studied alloys is defined. Differences in the structure and distribution of second-phase particles in the weld metal are shown. The weld zone of Al-Cu alloy consists of equal size grains, with intermetallic particles located along the grain boundaries. The weld structure of Al-Mg alloy is banded, with alternating layers consisting of different size grains.

• Periodical: Advanced Materials Research (Volume 872)
• Pages: 174-179
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.872.174
• Online since: December 2013
• Authors: Olga Sizova, Galina V. Shlyakhova, Alexander Kolubaev, Evgeny A. Kolubaev, Sergey Grigorievich Psakhie, Gennadii Rudenskii, Alexander G. Chernyavsky, Vitalii Lopota
• Keywords: Aluminium Alloy, Deformation, Friction Stir Welding (FSW), Metallographic Study, Microstructure, Phase Structure, Plastic Flow

References

[1] Yu.V. Klimenko, A method of friction welding of metals, USSR Patent No. 195846. (1967).

[2] W.M. Thomas, E.D. Nicholas, J.C. Needham, M.G. Murch, P. Templesmith, and C.J. Dawes, G.B. Patent Application No. 9125978. 8. (1991).

[3] . ] A. Kolubaev, S. Tarasov, O. Sizova, E. Kolubaev, Scale-dependent subsurface deformation of metallic materials in sliding, Tribology International. 43(4) (2010) 695–699.

DOI: 10.1016/j.triboint.2009.10.009

[4] V.E. Panin, Foundations of physical mesomechanics, Phys. Mesomech. 1 (1) 1998 5-22.

[5] J.J. Muhsin, H. Moneer, A.M. Muhammed, Effect of Friction Stir Welding Parameters (Rotation and Transverse) Speed on the Transient Temperature Distribution in Friction Stir Welding of AA 7020-T53, ARPN Journal of Engineering and Applied Sciences. 7 (4) (2012).

[6] P.A. Vityaz, V.E. Panin, A.V. Byeli, A.V. Kolubaev, Mechanics of plastic deformation and fracture of surface-hardened solids in friction, Phys. Mesomech. 5 (1) (2002) 15–26.

[7] A. Goloborodko, T. Ito, X. Yun, Y. Motohashi and G. Itoh, Friction Stir Welding of a Commercial 7075-T6 Aluminum Alloy: Grain Refinement, Thermal Stability and Tensile Properties, Materials Transactions. V. 45 (8) (2004) 2503 – 2508.

DOI: 10.2320/matertrans.45.2503

[8] K.N. Krishnan. On the formation of onion rings in friction stir welds, Materials science and engineering: A. 327 (2) (2002). 246-251.

DOI: 10.1016/s0921-5093(01)01474-5

[9] M.A. Sutton, B. Yang, A.P. Renolds, R. Taylor, Microstructural studies of friction stir welds in 2024-T3 aluminum, Materials science and engineering: A. 323 (2002) 160-166.

DOI: 10.1016/s0921-5093(01)01358-2

[10] Hirotaka Kato, Masato Sasase, Nobuaki Suiya. Friction-induced ultra-fine and nanocrystalline structures on metal surfaces in dry sliding, Tribology International. V. 43 (2010) 925-928.

DOI: 10.1016/j.triboint.2009.12.040

[11] Cemal Meran, The joint properties of brass plates by friction stir welding, Materials & Design. V. 27 (9) (2006) 719-726.

DOI: 10.1016/j.matdes.2005.05.006

[12] Z.W. Chen, T. Pasang, Y. Qi. Shear flow and formation of Nugget zone during friction stir welding of aluminium alloy 5083-O, Materials Science and Engineering: A. V. 474 (2008) 312–316.

DOI: 10.1016/j.msea.2007.05.074

[13] S. Kahl, The influence of small voids on the fatigue strength of friction stir welds in the aluminium alloy AA6061-T6, HERON. 55 (3/4) (2010) 223–234.

[14] K. Kumar, Satish V. Kailas, The role of friction stir welding tool on material flow and weld formation, Materials Science and Engineering. A 485 (2008) 367–374.

DOI: 10.1016/j.msea.2007.08.013