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Effect of Cold-Drawing Deformation on the Microstructure and Properties of AA2024-T8

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Abstract

T8 treatment includes solution treatment, cold working and artificial aging treatment. T8 treatment can greatly improve the hardness and strength of 2024 aluminum alloy without reducing the corrosion resistance. The effect of 0, 1, 2, 3, and 4% cold-drawing deformation on the microstructures of the alloy was observed by transmission electron microscopy, and properties of the alloy was investigated by hardness tests, tensile tests and electrochemical corrosion tests. The results show that the mechanical properties and corrosion resistance of cold-drawing deformed 2024 aluminum alloy are better than those of non-deformed alloy. Compared with AA2024-T6, AA2024-T8 with 2% cold-drawing deformation has a higher hardness by 11.3%, and a higher tensile strength by 10.8%. The improvement of the properties of AA2024-T8 is mainly due to the interaction between dislocations and precipitates. With the increase in cold-drawing deformation, the nucleation points of precipitates in AA2024-T8 gradually increase, and precipitates are gradually coarsened under the same artificial aging treatment.

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Funding

This research was financially supported by the Liaoning Natural Science Foundation (2021-MS-235), the Science and Technology Program of Liaoning Provincial Department of Education (LJGD2020010) and the National Nature Science Foundation of China (51775353).

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  1. School of Materials Science and Engineering, Shenyang University of Technology, 110870, Shenyang, China

    Y. X. Jia, R. M. Su, W. J. Zhang, G. L. Li, Y. D. Qu & R. D. Li

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Jia, Y.X., Su, R.M., Zhang, W.J. et al. Effect of Cold-Drawing Deformation on the Microstructure and Properties of AA2024-T8. Phys. Metals Metallogr. 124, 1501–1508 (2023). https://doi.org/10.1134/S0031918X22100362

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