Tensile Properties of Friction Stir Welding Aluminum Alloys Used in Aviation

Abstract:

AA7050and AA2024 aluminum alloys used in aviation were jointed by friction stir welding, and the tensile properties and fracture surfaces were investigated. The results show that the ultimate strength and the yield limit of welded materials can reach 90% and 75% for AA7075and AA2024 respectively, while the ultimate strength of AA7050/AA2024 FSW can reach 60.5% of AA7050 and 70.8% of AA2024, the yield limit can reach 46.2 % of AA7050 and 75.5% of AA2024. The equiaxial fine grains were found in weld nugget, the coarsen and distorted grains in the thermo-mechanically affected zone, and coarse grains in heat affected zone. The fractures occur at the advancing side between thermo-mechanically affected zone and heat affected zone. Dimples appeared on the fracture surfaces means that the fracture is ductile fracture.

• Periodical: Advanced Materials Research (Volume 842)
• Pages: 466-469
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.842.466
• Online since: November 2013
• Authors: Zhen Zhong Chen, Ming Li, Xiao Ge Ma, Yao Xiao
• Keywords: Aluminium Alloy, Fracture Surface, Friction Stir Welding (FSW), Tensile Properties

References

[1] Jian Yan , Chengyu Jiang, Jingyong Li. Advanced friction stir welding[J]. Light Alloy Fabrication Technology. 2003, (11): 37-40. (In Chinese).

[2] Guohong Luan, Delun Guo, Qiao Guan. Study on Friction Stir Welding Applied for Aircraft Manufacturing Industry[J]. Aeronautical Manufacturing Technology. 2002, (10): 43-46. (In Chinese).

[3] Kar-Erik Knipstim，Pekari Bertil．Frication stir welding process goes commercial[J]．Welding Journal，1997，76(9): 55-56.

[4] Chunrong Xu, Shizhong Wang , Jiangming Xu. Application of Friction Stir Welding Technology in Nuclear Industry[J]. Hot Working Technology. 2008, (7): 122-124. (In Chinese).

[5] A. GERLICH, P. SU, T.H. NORTH, Tool penetration during friction stir spot welding of Al and Mg alloys[J], JOURNAL OF MATERIALS SCIENCE, 40(2005)6473–6481.

DOI: 10.1007/s10853-005-1568-9

[6] G. Minak, L. Ceschini, I. Boromei, M. Ponte, Fatigue properties of friction stir welded particulate reinforced aluminium matrix composites[J], International Journal of Fatigue 32(2010), 218–226.

DOI: 10.1016/j.ijfatigue.2009.02.018

[7] P. Cavaliere, G.L. Rossi, R. Di Sante, M. Moretti, Thermoelasticity for the evaluation of fatigue behavior of 7005/ Al2O3/10p metal matrix composite sheets joined by FSW[J], International Journal of Fatigue, 30(2008), 198-206.

DOI: 10.1016/j.ijfatigue.2007.01.021

[8] D.M. Rodrigues, A. Loureiro, C. Leitao, R.M. Leal, B.M. Chaparro, P. Vilaca. Influence of friction stir welding parameters on the microstructural and mechanical properties of AA 6016-T4 thin welds[J], Materials and Design, 30(2009), 1913–(1921).

DOI: 10.1016/j.matdes.2008.09.016

[9] Hongwu Zhang, Zhao Zhang , Jintao Chen. Finite element analysis of friction stir welding process[J]. Transactions of the China Welding Institution, Vo l . 26 , No . 9( 2 0 0 5), 13-18. (In Chinese).

[10] Yuexian Cui, Changli Wang, Metal fracture analysis[M]. Harbin Institute of Technology Press. 1998. 4. (In Chinese).