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Microstructure, Mechanical and Corrosion Properties of Mg-1.61Al-1.76Ca Alloy under Different Extrusion Temperatures

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Abstract

Extrusion temperature can significantly influence grain size, the shape of second phase particles and the dislocation distribution of Mg alloys. In this study, the effects of extrusion temperatures ranging from 250 to 400 °C on the microstructure, mechanical properties and corrosion resistance of a Mg-Al-Ca alloy with 1.61 wt.% Al and 1.76 wt.% Ca (Mg-1.61Al-1.76Ca) were investigated. The results showed that the size of grains and phases increased with an increase in extrusion temperature; the yield strength and ultimate tensile strength values decreased with an increase in temperature, while the fracture elongation increased initially (up to 300 °C) and decreased thereafter with an increase in temperature. Under test, the extruded alloy exhibited some evidence of corrosion at 250 °C, while extrusion at 300 °C demonstrated better corrosion resistance. Thus, the 300 °C extruded alloy possessed the optimum comprehensive performance because of the relatively small grains, fine second phase particles and fewer dislocations.

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Acknowledgments

This work was financially supported by the Fundamental Research Funds for the Education Department of Hunan Province (17A019, 15C0116, 16C0140), China. The authors also acknowledge the Project (KC1809018, K1705052) supported by the science and technology program of Changsha and the outstanding youth project (18B418) of Education Department of Hunan Province, China.

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Authors and Affiliations

  1. Department of Mechanical and Electronic Engineering, Changsha University, Changsha, 410022, China

    Zhuo Fu, Guofeng Li, Yu Yao, Yu Liu, Tianhao Zheng & Hanqing Xiong

  2. School of Materials Science and Engineering, Hebei University of Technology, Tianjin, 300130, China

    Zhifeng Wang, Hui Yu & Hanqing Xiong

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  1. Zhuo Fu
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Fu, Z., Wang, Z., Li, G. et al. Microstructure, Mechanical and Corrosion Properties of Mg-1.61Al-1.76Ca Alloy under Different Extrusion Temperatures. J. of Materi Eng and Perform 29, 672–680 (2020). https://doi.org/10.1007/s11665-020-04557-8

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  • DOI: https://doi.org/10.1007/s11665-020-04557-8

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