Hot deformation and heat treatment process of 7050 aluminum alloy forgings for aerospace

doi:10.13251/j.issn.0254-6051.2024.04.034

Abstract

Abstract: Effects of aging process and final forging deformation on the microstructure and properties of 7050 aluminum alloy forgings were investigated by means of optical microscope, transmission electron microscope, tensile test at room temperature and electric conductivity tests. The results show that both the tensile strength and yield strength of the 7050 aluminum alloy forgings decrease with the increase of second aging time, but the electrical conductivity and elongation increase. The properties of forgings satisfy the requirements of the new generation 7050 aluminum alloy forgings after the optimal aging process at 120 ℃ for 6 h and 168 ℃ for 12 h. The final pass deformation has a significant effect on the three-dimensional properties of the 7050 aluminum alloy forgings. Under the optimal aging process, the best comprehensive properties can be obtained when the final pass deformation is 45%, and the three-dimensional tensile strength, yield strength and elongation meet the standard requirements.

Key words: forging deformation, aging treatment, 7050 aluminum alloy, mechanical properties

CLC Number:

TG146.2

Fan Xi, Sheng Zhiyong, Jiang Ao, Ni Ke, Xiao Yuqing, Zhao Yongxing. Hot deformation and heat treatment process of 7050 aluminum alloy forgings for aerospace[J]. Heat Treatment of Metals, 2024, 49(4): 214-219.

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