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Microstructure, mechanical properties and deformation mechanisms of an Al-Mg alloy processed by the cyclical continuous expanded extrusion and drawing approach

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Abstract

Al—Mg alloys are an important class of non-heat treatable alloys in which Mg solute and grain size play essential role in their mechanical properties and plastic deformation behaviors. In this work, a cyclical continuous expanded extrusion and drawing (CCEED) process was proposed and implemented on an Al—3Mg alloy to introduce large plastic deformation. The results showed that the continuous expanded extrusion mainly improved the ductility, while the cold drawing enhanced the strength of the alloy. With the increased processing CCEED passes, the multi-pass cross shear deformation mechanism progressively improved the homogeneity of the hardness distributions and refined grain size. Continuous dynamic recrystallization played an important role in the grain refinement of the processed Al—3Mg alloy rods. Besides, the microstructural evolution was basically influenced by the special thermomechanical deformation conditions during the CCEED process.

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Acknowledgements

This work was financially supported by the National Natural Science Foundation of China (No. 51774124), the Hunan Provincial Natural Science Foundation of China (No. 2019JJ40017), the Key Technologies R&D in Strategic Emerging Industries and Transformation in High-tech Achievements Program of Hunan Province, China (No. 2019GK4045), and the Graduate Training and Innovation Practice Base of Hunan Province, China.

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Authors and Affiliations

  1. College of Materials Science and Engineering, Hunan University, Changsha, 410082, China

    Ruiqing Lu, Long Zhang, Shuwei Zheng, Dingfa Fu, Jie Teng, Fulin Jiang & Hui Zhang

  2. Hunan Province Engineering Research Center for High Performance Super Long Scale Light Alloy Materials, Yueyang, 414005, China

    Dingfa Fu, Jie Teng, Jianchun Chen, Guodong Zhao, Fulin Jiang & Hui Zhang

  3. Hunan Jinlianxing Special Materials Co., Ltd., Yueyang, 414005, China

    Jianchun Chen & Guodong Zhao

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  1. Ruiqing Lu
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Correspondence to Dingfa Fu or Jie Teng.

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Lu, R., Zhang, L., Zheng, S. et al. Microstructure, mechanical properties and deformation mechanisms of an Al-Mg alloy processed by the cyclical continuous expanded extrusion and drawing approach. Int J Miner Metall Mater 29, 108–118 (2022). https://doi.org/10.1007/s12613-021-2342-y

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