【摘 要】
：
在Mg-8Li-3Al合金的凝固过程中,不同功率的超声波被引入到合金熔体中.在超声作用下研究Mg-8Li-3Al合金的微观结构、耐腐蚀性能和力学性能.基于超声空化作用及声流作用,对超声
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在Mg-8Li-3Al合金的凝固过程中,不同功率的超声波被引入到合金熔体中.在超声作用下研究Mg-8Li-3Al合金的微观结构、耐腐蚀性能和力学性能.基于超声空化作用及声流作用,对超声细化机制进行分析.结果表明:在施加超声波后,合金的α相形貌从粗大的蔷薇状结构变为细小的近球状结构.当超声波功率为170W时,能够获得细小的球状结构.与没有施加超声场的合金相比,施加超声场(功率170 W,作用时间90 s)后的合金耐腐蚀性明显提高,力学性能也有很大改善,抗拉强度和伸长率分别提高了9.5%和45.7%.
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