Comparison of castability,mechanical,and corrosion properties of Mg−Zn−Y−Zr alloys containing LPSO and W phases  

含LPSO相和W相Mg−Zn−Y−Zr合金铸造、力学和腐蚀性能的比较

作　　者：V.E.BAZHENOV S.S.SAIDOV Yu.V.TSELOVALNIK O.O.VOROPAEVA I.V.PLISETSKAYA A.A.TOKAR A.I.BAZLOV V.A.BAUTIN A.A.KOMISSAROV A.V.KOLTYGIN V.D.BELOV V.E.BAZHENOV;S.S.SAIDOV;Yu.V.TSELOVALNIK;O.O.VOROPAEVA;I.V.PLISETSKAYA;A.A.TOKAR;A.I.BAZLOV;V.A.BAUTIN;A.A.KOMISSAROV;A.V.KOLTYGIN;V.D.BELOV(National University of Science and Technology(MISiS),Leninskiy pr.4,Moscow,119049,Russia)

机构地区：[1]National University of Science and Technology(MISiS),Leninskiy pr.4,Moscow,119049,Russia

出　　处：《Transactions of Nonferrous Metals Society of China》2021年第5期1276-1290,共15页中国有色金属学报（英文版）

基　　金：the Ministry of Science and Higher Education of the Russian Federation in the framework of Increase Competitiveness Program of NUST«MISiS»(No.К2-2020-025),implemented by a governmental decree dated 16th of March 2013,N 211.

摘　　要：The Mg–Zn–Y–Zr alloys with long-period stacking-ordered(LPSO)and W eutectic phases were investigated to develop new magnesium casting alloys.The temperatures for T6 heat treatment were selected based on the hardness and electrical conductivity measurements.The hot tearing susceptibility of the alloys with LPSO phase is lower than that of the alloys with W phase,which is associated with the freezing range of the alloys.However,the investigated alloys displayed the same fluidity.Under T6 conditions,increasing the Y content in the alloys resulted in increased yield strength,whereas other tensile properties were similar for the alloys.The corrosion resistance was higher for the alloys with LPSO phase compared to that of the alloys with W phase.Mg−2.5Zn−3.7Y−0.3Zr(mass fraction,%)alloy with LPSO phase possessed high castability and mechanical properties,with a corrosion rate of 2 mm/year.为了开发新型铸造镁合金,研究含长周期堆垛相(LPSO)和W共晶相的Mg−Zn−Y−Zr合金。硬度和电导率测试结果表明,T6热处理的温度是合适的。与含W相的合金相比,含LPSO相合金的热裂敏感性更低,这与合金的凝固区间有关。然而,两者具有相同的流动性。在T6条件下,增加Y含量可以提高合金的屈服强度,但合金的其他拉伸性能基本相同。与含W相的合金相比,含LPSO相的合金具有更优的耐腐蚀性。含LPSO相的Mg−2.5Zn−3.7Y−0.3Zr(质量分数,%)合金具有良好的铸造性能和力学性能,其腐蚀速率为2 mm/year。

关 键 词：magnesium alloy casting LPSO phase W phase FLUIDITY hot tearing susceptibility corrosion rate 

分 类 号：TG146.22[一般工业技术—材料科学与工程]