Research on the Material Differences of 7050-T7451 Aluminum Alloy

Abstract:

Microstructure analysis and tensile fracture analysis were conducted on the domestic and imported 7050-T7451 aluminum alloy to investigate the material differences between them. Tensile test shows that the yield strength and tensile strength of domestic 7050-T7451 aluminum alloy are both higher than imported 7050-T7451 aluminum alloy, however, the material elongation and the reduction of area are both lower than imported material. Microstructure analysis shows that compared with domestic 7050-T7451 aluminum alloy, in the imported 7050-T7451 aluminum alloy, the degree of recrystallization and anisotropy is less, and the grain size is smaller. In addition, the transition from material surface to center organization of imported 7050-T7451 aluminum alloy is more smooth and uniform than domestic material. From tensile fracture analysis, it concluded that the domestic 7050-T7451 aluminum alloy has large grain size, low structural homogeneity, and little toughness characteristic of fracture, and those characteristics cause low elongation and low reduction of area of domestic 7050-T7451 aluminum alloy.

• Periodical: Applied Mechanics and Materials (Volumes 727-728)
• Pages: 115-118
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.727-728.115
• Online since: January 2015
• Authors: Wei Han Wang, Wei Fang Zhang*, Wei Zhang, Jin Song Yang
• Keywords: Aluminum Alloy 7050-T7451, Material Differences, Microstructure Analysis, Tensile Fracture Analysis

References

[1] L. S. Rossino, F. C. Castro, W. W. Bose Filho, J.A. Araújob. Issues on the mean stress effect in fretting fatigue of a 7050-T7451 Al alloy posed by new experimental data, J. Sci. International Journal of Fatigue. 31 (2009) 11-12.

DOI: 10.1016/j.ijfatigue.2008.12.011

[2] S. Fengxuan, Z. Xinming, L. Shengdan, et al. Anisotropy of localized corrosion in 7050-T7451 Al alloy thick plate, J. Sci. Transactions of nonferrous metals society of China. 23 (2013) 2483-2490.

DOI: 10.1016/s1003-6326(13)62758-2

[3] D. Tolga, S. Costas. Recent developments in advanced aircraft aluminium alloys, J. Sci. Material and design. 56 (2014) 862-871.

[4] Z. Weifang, G. Wei, G. Aiguo. Recrystallization and fatigue failure of blades made of a directionallysolidified alloy, J. Sci. Chinese Journal of Aeronautics. 24 (2003) 377-381.

[5] L. Wei, P. Qinglin, H. Hongfeng, et al. Influence of grain structure and crystallographic orientation on fatigue crack propagation behavior of 7050 alloy thick plate, J. Sci. International Journal of Fatigue, 66 (2014) 55-64.

DOI: 10.1016/j.ijfatigue.2014.03.009

[6] L. Harold, R.H. Michael. The effects of laser peening and shot peening on high cycle fatigue in 7050-T7451 aluminum alloy, J. Sci. Materials Science and Engineering A, 527 (2010) 699-707.

DOI: 10.1016/j.msea.2009.08.045

[7] G. Yukui. Improvement of fatigue property in 7050–T7451 aluminum alloy by laser peening and shot peening, J. Sci. Materials Science and Engineering, 528 (2011) 3823-3828.

DOI: 10.1016/j.msea.2011.01.077

[8] W. Yilin, P. Qinglin, W. Lili, et al. Effect of retrogression and reaging treatment on the microstructure and fatigue crack growth behavior of 7050 aluminum alloy thick plate, J. Sci. Material and design, 55 (2014) 857-863.

DOI: 10.1016/j.matdes.2013.09.063