ejmse.2025.10.02.135

INVESTIGATION OF MICROSTRUCTURE, CORROSION PERFORMANCE AND MECHANICAL PROPERTIES OF Mg- 5.45Zn- 6.63Sn- 0.51Ca ALLOY

European Journal of Materials Science and Engineering, Volume 10, Issue 2, 2025
PDF Full Article,  DOI: 10.36868/ejmse.2025.10.02.135,   pp. 135-150
Published: June 20, 2025

Md Nahid Rahman NAFI1,*, Aninda Nafis AHMED2, Hossain M.M.A. RASHED1
1 Department of Materials and Metallurgical Engineering, Bangladesh University of Engineering and Technology, Dhaka 1000, Bangladesh
2 Bangladesh Council of Scientific and Industrial Research (BCSIR), Dhaka 1000, Bangladesh

* Corresponding author: mdnahidrahman.mme.buet@gmail.com

Abstract

In this paper, the study of research on the microstructure and corrosion behavior and mechanical properties of a Mg-5.45Zn-6.63Sn-0.51Ca alloy under different thermal and mechanical states is reported. The cast of the alloy in a mild steel mould took place at 700°C; then, it was homogenized at 400°C for 18 hours and characterized by means of optical microscopy, X-ray diffraction, and scanning electron microscopy. The corrosion behavior was tested in the 3.5% NaCl solution using corrosion potential and linear polarization resistance (LPR) measurements. Post-corrosion analysis of the degraded surface was carried out by SEM. After that, the samples were hot-rolled at 400°C down to 15% of their original thickness and again tested. It was therefore concluded that hot rolling had a major microstructural influence on the properties, an observation consistent with comparison between results in the homogenized and rolled conditions. Hot Rolling tends to improve the corrosion resistance of the alloy and refines the microstructure. Tensile strength, and elongation at failure were obtained using tensile tests, carried out on the hot-rolled samples at temperatures ranging from 200 to 350°C, and two strain rates of 10-4 and 5×10-4 s-1.

Keywords: Mg-Zn-Sn-Ca alloy; Corrosion Resistance; High Temperature Mechanical Properties.

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