含LPSO相和W相Mg−Zn−Y−Zr合金铸造、力学和腐蚀性能的比较

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

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA（2021）

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Abstract

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.

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Key words

LPSO phase, Wphase, fluidity, hot tearing susceptibility, corrosion rate, magnesium alloy

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