Study of Solid Solution Treatment on Spray Deposited 7A04 Alloy

Rui Ming Su; Ying Dong Qu; Run Xia Li; Rong De Li

doi:10.4028/www.scientific.net/AMM.217-219.1853

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 217-219Study of Solid Solution Treatment on Spray...

Study of Solid Solution Treatment on Spray Deposited 7A04 Alloy

Abstract:

The Al-Zn-Mg-Cu (7A04) alloys were prepared by using the method of spraying deposition and the hot extrusion. The effects of two-stage solid solution treatment and single solid solution treatment on the microstructure and mechanical properties of spray deposited 7A04 alloy were investigated. The microstructure and mechanical properties were observed and tested by optical microscopy, SEM, X-ray diffraction and other methods. It is indicated that the two-stage solid solution treatment is better than the single. After the two-stage solid solution, the sizes of recrystallization grains were small and a lot of precipitations were dissolved. And the microstructure was nice by ageing treatment. The tensile strength and elongation of the alloy can respectively reach 740MPa and 5.8 percent by the two-stage solid solution (at 450°C for 1 hour and 475°C for 2 hours) and the aging treatment.