Improvements in Strength and Electrical Conductivity in 7B04 Aluminum Alloy Pre-Stretched Thick Plates Via Low-Temperature Retrogression and Re-Ageing Heat Treatments

Zhi Hui Li; Bai Qing Xiong; Yong An Zhang; Bao Hong Zhu; Feng Wang; Hong Wei Liu

doi:10.4028/www.scientific.net/MSF.561-565.139

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HomeMaterials Science ForumMaterials Science Forum Vols. 561-565Improvements in Strength and Electrical...

Improvements in Strength and Electrical Conductivity in 7B04 Aluminum Alloy Pre-Stretched Thick Plates Via Low-Temperature Retrogression and Re-Ageing Heat Treatments

Abstract:

The effect of RRA treatment with using low retrogression temperatures between 170°C to 190°C on the strength and electrical conductivity (as an indicator of corrosion resistance) of 7B04 aluminum alloy thick plates was investigated. The research results showed that the low-temperature RRA heat treatment provides a means for improving electrical conductivity of the aluminum alloy 7B04 pre-stretched thick plates without sacrificing the mechanical strength. The RRA temper with retrogression at 180°C for 60 min improved electrical conductivity remarkably (reached 21.0MS/m), with only a 3% reduction in strength below T6 temper. Furthermore, TEM observations showed that the microstructure of RRA treated alloy was a very fine distribution of η′ MgZn2 precipitates in the aluminum matrix, similar to T6 condition and η MgZn2 precipitates on grain boundaries distributed similarly to T73 temper.

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Periodical:

Materials Science Forum (Volumes 561-565)

Pages:

139-142

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.561-565.139

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Online since:

October 2007

Authors:

Zhi Hui Li, Bai Qing Xiong, Yong An Zhang, Bao Hong Zhu, Feng Wang, Hong Wei Liu

Keywords:

7B04 Aluminum Alloy, Electrical Conductivity, Pre-Stretched Thick Plates, Reageing, Retrogression, Tensile Strength

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References

[1] I.N. Fridlyander. Mater. Sci. Forum, Vol. 331-337 (2000): p.921.

Google Scholar

[2] I.N. Fridlyander, AV. Dobromyslov, E.A. Tkachenko, and O.G. Senatorova: Met Sci Heat treat, Vol. 47(2005): p.269.

DOI: 10.1007/s11041-005-0066-7

Google Scholar

[3] B. Cina, and B. Ranish. U.S. Patent. 3856584. (1974).

Google Scholar

[4] M.A. Salazar-Guapuriche, Y.Y. Zhao, A. Pitman and A. Greene: Mater. Sci. Forum, Vol. 519-521(2006): 853.

Google Scholar

[5] D.K. Denzer, D.J. Chakrabarti, J. Liu, LE. Oswald, and RW. Westerlund. U.S. Patent, 20030051784. (2003) (a) T6 temper (b)T73temper temper (c) Retrogressed at 180°C for 30min and re-aged (d) Retrogressed at 180°C for 60min and re-aged.

Google Scholar