Influence of Ageing on Yield Stress Anisotropy of Extruded 7075 Aluminum Alloy Bar at Ambient Temperature

Abstract:

Uniaxial tensile tests of extruded 7075 aluminum alloy bar were carried out on the universal test machine at strain rate of 0.001 s-1. The tensile direction are aligned at 0°, 45°and 90°to the axis direction of the bar. Microstructure and texture was characterized using Optical Microscopy and x ray diffraction analysis. The results show that the yield stress for 0° orientation specimen, which was solution treated, is the highest, while that of 45° orientation is the lowest. The yield stresses are anisotropic for solution treated 7075 extruded bar, which could be attributed to the elongated grain structures and the texture of the bar. The yield stress anisotropic behavior diminished after peak aged.

• Periodical: Applied Mechanics and Materials (Volumes 190-191)
• Pages: 500-503
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.190-191.500
• Online since: July 2012
• Authors: Zhi Min Zhang, Yong Biao Yang, Ke Ren Xu
• Keywords: 7075 Aluminum Alloy, Aged, Elongated Grain, Solution, Texture

References

[1] Woei-Shyan, Lee, Wu-Chung, SueChi-Feng: J Mater Pro Tech, Vol. 100 (1) (2000), pp.116-122.

[2] Taku Sakai, Xuyue Yang, Hiromi Miura: Mater Sci Eng A, Vol. 234 (30) (1997), pp.857-860.

[3] Y H Zhao X Z Liao Z Jin: Acta Mater, Vol. 52(2004), p.4589–4599.

[4] T Sakai H, Miura, A Goloborodko, O Sitdikov: Acta Mater, Vol. 57(2009), pp.153-126.

[5] H.E. Hu, L. Zhen, B.Y. Zhang: Mater Characterization, Vol. 59 (9) (2008), pp.1185-1189.

[6] Tore Borvik, O S Hopperstad, Ketill O. Pedersen: Inter J Impact Eng, Vol. 2010(37), p.537–551.

[7] M. A Meyers and E. Ashworth: Phil. Mag. Vol. 46 (1982). p.737.

[8] M. F. Ashby: Phil. Mag. Vol. 21 (1970) p.399.

[9] R. Jayaganthana, H. -G. Brokmeiera, Bernd Schwebkea, S.K. Panigrahic: Journal of Alloys and Compounds Vol. 496 (2010) p.183.