![]() studied the corrosion performance of the extruded Mg-(1–4%) Zn alloy, and the results showed that the addition of 1%Zn had the best protection effect on the matrix, and the Zn dissolved in α-Mg matrix can enhance the protective effect of the passive film on the matrix. found that the yield strength and elongation increased with the increase of Zn content. When studying the microstructure and mechanical properties of as-extruded Mg-8Al-2Sn-xZn (x = 0.5, 1 and 1.5 wt.%) alloy, Wang et al. Zn, an inexpensive element, can significantly refine the grain and improve the corrosion resistance of magnesium alloys. ![]() studied the effect of extrusion speed on Mg-3Sn-2Ca and Mg-5Sn-2Ca alloys and found that the second phase of both alloys were composed of CaMgSn and Mg 2Ca phases, and the increase of extrusion speed will coarsen the grains and reduce the mechanical properties. ![]() studied the effect of the addition of the trace Ce on the mechanical properties of rolled Mg-1.5Sn-0.5Ca alloy and showed that the addition of minor Ce can refine the eutectic structure between CaMgSn and α-Mg, which can make the eutectic structure more evenly distributed in the Mg matrix and improve the strength of the alloys. studied the hot deformation behavior of Mg-3Sn-1Ca alloy and Mg-3Sn-1Ca alloy under compression and found that CaMgSn particles caused significant back stress during hot deformation. After adding Ca elements to magnesium alloys, CaMgSn and Mg 2Sn form heat resistant phases and refine grains, which improves high-temperature resistance. Furthermore, the Mg–Sn–Ca alloy has attracted extensive attention in recent years due to its good heat resistance. Adding 1–2%Sn can form a Mg 2Sn phase with a high melting point in magnesium and its alloys. Studies have shown that Sn has high solid solubility in magnesium and significant precipitation strengthening. Among many alloy elements, the low price Sn has attracted much attention in recent years. However, their poor strength and plasticity seriously affect the practical application of magnesium alloys, and it is often necessary to improve the strength and plasticity of alloys by affecting the grain size, texture, second phase category and distribution of alloys through thermal deformation and alloying. Magnesium alloys, as the lightest metal structure material, are widely used in the 3C electronics industry, aerospace, transportation and other fields at present due to their high strength and specific stiffness. Interestingly, the addition of Zn to Mg-3Sn-1Ca-1Cu alloy can improve the elongation of the alloy, which is due to the solid solution strengthening caused by the Zn element and the formation of small MgZnCu phase with Zn element and the consumption of Mg2Cu phase. However, the UTS of the TXC311 alloy is increased by 55 MPa, but the ductility of the Mg-3Sn-1Ca-1Cu alloy is far less than that of the Mg-3Sn-1Ca-1Zn alloy, which is mainly attributed to the presence of a large amount of hard and brittle Mg2Cu phase in the alloy. Compared with the Mg-3Sn-1Ca alloy, the UTS and E L of the Mg-3Sn-1Ca-1Zn alloy are increased by 50 MPa and 132%, respectively. The as-extruded Mg-3Sn-1Ca-1Zn-1Cu alloy has the best comprehensive mechanical properties, and the UTS, YS and E L are 244 MPa, 159 MPa and 13.4%, respectively. The mechanical test results show that the addition of Zn and Cu elements can significantly improve the mechanical properties of the alloy. The effects of the grain size, texture, type and distribution of the second phase on the mechanical properties of the alloy were analyzed. The effects of Zn and Cu addition on the microstructure and mechanical properties of the extruded Mg-3Sn-1Ca alloy were systematically studied.
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