高可铸性和耐燃性新型Mg–Zn–Y–Zr合金的组织和力学性能

T.A. Koltygina; V.E. Bazhenov; A.V. Koltygin; A.S. Prosviryakov; N.Y. Tabachkova; I.I. Baranov; A.A. Komissarov; A.I. Bazlov

doi:10.1007/s12613-024-2980-y

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T.A. Koltygina, V.E. Bazhenov, A.V. Koltygin, A.S. Prosviryakov, N.Y. Tabachkova, I.I. Baranov, A.A. Komissarov, and A.I. Bazlov, Microstructure and mechanical properties of new Mg–Zn–Y–Zr alloys with high castability and ignition resistance, Int. J. Miner. Metall. Mater., 31(2024), No. 12, pp.2714-2726. https://dx.doi.org/10.1007/s12613-024-2980-y

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高可铸性和耐燃性新型Mg–Zn–Y–Zr合金的组织和力学性能

摘要: 本论文对新型Mg – Zn – Y – Zr系合金进行了一系列复杂的研究。通过热力学计算确定了Mg –Z n – Y – Zr体系合金中形成的MgSS (Mg固溶体)+ LPSO(长周期有序堆积)两相结构的含量范围。研究了热处理工艺对合金显微组织、力学性能和腐蚀性能的影响。测定了合金的流动性、热裂趋势和着火温度。Mg – 2.4Zn – 4Y – 0.8Zr确定为合金铸造性能、力学性能和腐蚀性能的最佳组合。所研究的合金在技术性能方面优于工业上的同类合金，同时保持较高的腐蚀和力学性能。性能的提高是通过适当的热处理方式来实现的，该热处理机制提供了LPSO相的18R到14H改性的完全转变。

Microstructure and mechanical properties of new Mg–Zn–Y–Zr alloys with high castability and ignition resistance

Abstract: Complex studies of new Mg–Zn–Y–Zr system alloys have been carried out. The content range for the formation of the two-phase structure MgSS (Mg solid solution) + LPSO (long-period stacking ordered) in alloys of the Mg–Zn–Y–Zr system was determined by thermodynamic calculations. The effect of heat treatment regimes on microstructure, mechanical, and corrosion properties was investigated. The fluidity, hot tearing tendency, and ignition temperature of the alloys were determined. The best combination of castability, mechanical, and corrosion properties was found for the Mg–2.4Zn–4Y–0.8Zr alloy. The alloys studied are superior to their industrial counterparts in terms of technological properties, while maintain high corrosion and mechanical properties. The increased level of properties is achieved by a suitable heat treatment regime that provides a complete transformation of the 18R to 14H modification of the LPSO phase.

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