含LPSO相和W相Mg−Zn−Y−Zr合金铸造、力学和腐蚀性能的比较
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA(2021)
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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