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A novel process for fabricating Mg-AZ31B/Al 6063 composite clad sheets that significantly improved mechanical behavior and microstructure via combining continuous shear deformation and direct extrusion

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A Correction to this article was published on 15 March 2024

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Abstract

This study proposed the direct extrusion and continuous-shear deformation (DECS) process for the co-extrusion of Mg-AZ31B/Al 6063, aiming to prepare high-plasticity Mg/Al composite sheets. The effect of extrusion temperature on the microstructure and mechanical properties of the Mg/Al composite sheet was systematically studied. The results show that Mg/Al composite sheets with no voids or cracks at the interface were successfully prepared by the DECS process. The microstructure of the Mg layer at different extrusion temperatures primarily consists of equiaxed fine grains, with grain sizes of 7.29 μm, 8.98 μm, and 9.88 μm at 330℃, 360℃, and 390℃, respectively. The Mg layer exhibits a typical extrusion texture, with the c-axis of most grains parallel to the transverse direction (TD). With the increase in extrusion temperature, the c-axis of some grains deviates from the TD toward the normal direction (ND). The Al layer mainly consists of elongated deformed grains and fine dynamically recrystallized (DRXed) grains distributed along the extrusion direction (ED). The AZ31 Mg alloy with refined grains maintains the ultimate tensile strength of the Mg/Al composite sheet, while the Al matrix enhances its plasticity. At 330℃, the Mg/Al composite sheet shows an ultimate tensile strength of 244.48 MPa ± 4.35 and an elongation of 39.42% ± 0.06. The influence of the bonding layer thickness on the shear and tensile properties of the composite sheet was studied, revealing that increasing the bonding layer thickness reduces the shear strength of the Mg/Al composite sheet but positively affects its tensile strength.

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Funding

The authors are grateful for the National Science Foundation of China (52071042), Chongqing Talent Plan (CQYC202003047), and Chongqing Natural Science Foundation Project of CSTC2021YCJH-BGZXM0148. The authors also would like to thank Rui Hong from the Electron Microscope Center of Chongqing University for he Help in taking micrographs of specimens.

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• Hong-jun Hu is the corresponding author of this paper who wrote the paper.

• Wei Zhang did the examples and wrote the article in this paper.

• Ting Yuan: Methodology, Resources, Data curation.

• Wei Peng: Methodology, Supervision, Formal analysis.

• Zhenwei Sun: Methodology, Software, Investigation, Validation.

• Chaowei Zeng: Methodology, Resources, Data curation.

• Zhongwen Ou: Methodology, Visualization.

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Correspondence to Hongjun Hu.

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Title in English: The International Journal of Advanced Manufacturing Technology.

Title of article: A novel process for fabricating Mg-AZ31B/Al 6063 composite clad sheets that significantly improved mechanical behavior and microstructure via combining continuous shear deformation and direct extrusion.

Names of ALL contributing authors: Wei Zhang, Ting Yuan, Wei Peng, Hongjun Hu, Zhenwei Sun, Chaowei Zeng, Zhongwen Ou.

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Zhang, W., Yuan, T., Peng, W. et al. A novel process for fabricating Mg-AZ31B/Al 6063 composite clad sheets that significantly improved mechanical behavior and microstructure via combining continuous shear deformation and direct extrusion. Int J Adv Manuf Technol 131, 5711–5725 (2024). https://doi.org/10.1007/s00170-024-13254-y

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