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Analysis of Multi-angular Twist Channel Extrusion Technique for Processing AA2024 Aluminium Alloy

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Abstract

This article proposes a new severe plastic technique named Multi-angular twist channel extrusion (MATE) to process the AA2024 aluminium alloy in a single pass. This method was devised to impose a large strain in a single pass with better strain homogeneity and lower punch load. To understand the deformation behavior of the AA2024 alloy during the MATE process, hardness, strain behavior, and microstructure analysis were performed in each shear zones. From the finite element analysis, an average effective strain of 2.78 was achieved with good strain homogeneity. The tensile strength and hardness of AA2024 alloy were increased by 80.5 and 91.27%, respectively. The electron back scatter diffraction analysis reveals that the average grain size was 1.8 µm and a strong texture was developed in the processed AA2024 alloy. The XRD analysis reveals a high amount of dislocation density (3.18 × 1014 M−2) in the extruded metal. Enhancement in the mechanical properties was attributed to grain refinement and strain hardening. Continuous dynamic recrystallization has occurred due to the formation of fine grains and the conversion of low-angle grain boundaries to high-angle grain boundaries during the MATE process.

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Acknowledgements

The authors are grateful to the DST-SERB, New Delhi, India for their grant support and the department of mechanical engineering of SRM institute of Science and Technology for providing the facilities to carry out the research.

Funding

This research is supported by the department of Science and Technology-Science & Engineering Research Board (DST-SERB), New Delhi, India, under the Core Research Grant (CRG), Grant No. [CRG/2021/000499].

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  1. Department of Mechanical Engineering, College of Engineering and Technology, SRM Institute of Science and Technology, SRM Nagar, Kattankulathur Campus, Tamil Nadu, 603203, India

    S. Muralidharan & U. Mohammed Iqbal

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  1. S. Muralidharan
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Correspondence to U. Mohammed Iqbal.

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Muralidharan, S., Iqbal, U.M. Analysis of Multi-angular Twist Channel Extrusion Technique for Processing AA2024 Aluminium Alloy. Met. Mater. Int. 29, 515–535 (2023). https://doi.org/10.1007/s12540-022-01221-9

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