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Effect of extrusion-ECA integrated large strain technology on microstructure and properties of 7075 aluminum alloy

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Abstract

In recent years, equal channel angular pressing (ECAP) which is a new technology to produce ultrafine grained materials by plastic deformation has attracted special attention. In this paper, the effects of extrusion-ECA integrated large strain technology on the structure and properties of 7075 aluminum alloys were studied by means of electron backscatter diffraction (EBSD), X-ray diffraction (XRD), hardness test, tensile test. The results show that the grain size of 7075 aluminium alloys processed by extrusion-ECA integrated large strain technology is further refined, the average grain size decreases from 8.53 to 6.55 μm. The extrusion-ECA integrated large strain technique also increases the percentage of the high-angle grain boundary of the alloy. Although the strength of the alloy is reduced, the elongation is increased from 10.17 to 15.82%. In addition, extrusion-ECA integrated large strain technology could reduce the degree of solution aging strengthening of 7075 aluminium alloys, but the plasticity of the material is significantly improved.

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Acknowledgements

The authors would like to acknowledge the Key Projects of the 13th Five-Year Plan Equipment Pre-research Foundation of the Ministry of Equipment Development of the Central Military Commission of China (No:6140922010201).

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Authors and Affiliations

  1. Engineering Institute of Advanced Manufacturing and Modern Equipment Technology, Jiangsu University, Zhenjiang, 212013, Jiangsu, China

    Xiaojing Xu, Qingjun Liu, Qiang Mao, Ze Jiang, Tianci Zhang, Hao Chen, Xu Zhang & Donghui Du

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  1. Xiaojing Xu
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Xu, X., Liu, Q., Mao, Q. et al. Effect of extrusion-ECA integrated large strain technology on microstructure and properties of 7075 aluminum alloy. Appl. Phys. A 126, 629 (2020). https://doi.org/10.1007/s00339-020-03811-z

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