Optimizing Solution Heat Treatment to Improve Mechanical Properties of Al Alloy 7055


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The influence of one- and two- stage solution heat treatment on the microstructure and mechanical properties of aluminum alloy 7055 was investigated. The results showed that in the case of one-stage solution heat treatment in the range of 450 °C to 470 °C, the strength increased while the ductility decreased with temperature. Further increasing temperature led to more dissolution of soluble constituents but a large amount of recrystallization, therefore, the strength decreased while ductility increased. The two-stage solution heat treatment, which included first stage of low-temperature-long-duration and second stage of high-temperature-short-duration heating was suggested for improvement of mechanical properties.



Materials Science Forum (Volumes 546-549)

Edited by:

Yafang Han et al.




J.H. You et al., "Optimizing Solution Heat Treatment to Improve Mechanical Properties of Al Alloy 7055", Materials Science Forum, Vols. 546-549, pp. 877-880, 2007

Online since:

May 2007




[1] G.T. Hahn, A.R. Rosenfield: Metall. Trans. A Vol. 6(1975), p.653.

[2] K.H. Chen, H.W. Liu and Z. Zhang: J. Mater. Process. Techl Vol. 142(2003), p.190.

[3] H. Toda, T. Kobayashi and A. Takahashi: Mater. Sci. Eng. A Vol. 280 (2000), p.69.

[4] A.J. Bryant, A.T. Thomas: J. Institute Metals Vol. 100(1972), p.40.

[5] V.V. Zakharov, II. Novikov and VI. Elagin: Metallov i Term Obrab Metal Vol. 5 (1970), p.70.

[6] X.M. Zhang, Z.B. Huang and S.D. Liu: accepted by Chinese Journal of Nonferrous Metals (2006).

[7] S.D. Liu, X.M. Zhang, Z.B. Huang: Trans. Mater. Heat Treat. Vol. 27(2006), p.54.

[8] O. Engler, E. Sachot and J.C. Ehrström: Mater. Sci. Techno Vol. 12(1996), p.717.

[9] F.J. Humphreys, M. Hatherly: Recrystallization and related annealing phenomena (Elsevier Science Inc., NewYork 1995).