The effects of the solution treatment on the microstructure, recrystallization, texture composition and properties of 7A65-T7451 (120 mm) hot rolled plates at H/2 (1/2 thickness) and H/4 (1/4 thickness) were studied. The results show that the hot rolled microstructure mainly contains a large amount of MgZn2 phases and minor Al7Cu2Fe phase. After solid solution treatments, a large amount of MgZn2 phases are dissolved back into the aluminum matrix. The main texture types at H/4 are R-Cube, Cube and part of Brass texture, and the main texture types at H/2 are Cube, R, and Copper texture. The qualitative analysis by Schmidt's law reveals that Copper texture at H/2 will deepen the anisotropy of plate metal properties. For the plate with the same thickness, the two-stage solution state has better mechanical properties due to the lower degree of recrystallization and stronger grain boundary strengthening effects. Under the two-stage solution system of 460 ℃/165 min+477 ℃/165 min, the composite mechanical properties of the alloy plate at H/4 are the best and the anisotropy is not obvious. The tensile strength, yield strength, and elongation along the rolling direction are 561.9 MPa, 523.4 MPa, and 10.6％, respectively..

The First Aircraft of Institute of AVIC,Xi'an 710000,China;Department of Materials Science and Engineering,Beihang University,Beijing 100191,China;Research Center for Lightweight Materials,Ningbo Institute of Technology,Beihang University,Ningbo 315100,China

[1]LI Chen;WANG Hao;WANG Wenbo;YE Chengtong;JIN Zuheng;ZHANG Xinquan;ZHANG Hu;JIA Lina-.Effect of Solution Treatment on Recrystallization, Texture and Mechanical Properties of 7A65-T74 Aluminum Alloy Super-thick Hot Rolled Plate)[J].武汉理工大学学报（材料科学版）（英文版）,2022(03):460-469

7A65,min+477

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