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

Ruiqing Lu; Long Zhang; Shuwei Zheng; Dingfa Fu; Jie Teng; Jianchun Chen; Guodong Zhao; Fulin Jiang; Hui Zhang

doi:10.1007/s12613-021-2342-y

Volume 29 Issue 1

Jan. 2022

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2022 > 29(1): 108-118

Ruiqing Lu, Long Zhang, Shuwei Zheng, Dingfa Fu, Jie Teng, Jianchun Chen, Guodong Zhao, Fulin Jiang, and Hui Zhang, 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(2022), No. 1, pp. 108-118. https://doi.org/10.1007/s12613-021-2342-y

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Ruiqing Lu, Long Zhang, Shuwei Zheng, Dingfa Fu, Jie Teng, Jianchun Chen, Guodong Zhao, Fulin Jiang, and Hui Zhang, 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(2022), No. 1, pp. 108-118. https://doi.org/10.1007/s12613-021-2342-y

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Research Article

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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Corresponding authors:
Dingfa Fu E-mail: hunu_fudingfa@163.com

Jie Teng E-mail: tengjie@hnu.edu.cn
Received: 17 July 2021; Revised: 9 August 2021; Accepted: 17 August 2021; Available online: 18 August 2021

Abstract

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.
- Al–Mg alloy;
- plastic processing;
- microstructure;
- mechanical properties;
- dynamic recrystallization

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