Mg-Gd系镁合金因满足航空航天材料轻量化、高温强度的要求而受到极大关注.简述了稀土Mg-Gd系合金的研究现状.从合金氧化夹杂、流动性能、Gd在合金中的偏析以及合金的热裂性等方面阐述了浇铸法制备Mg-Gd系合金的铸造性能.通过统计比较了近年来在Mg-Gd基础上设计出的合金在不同状态下的强度、塑性数据.阐述了合金在低温、室温下的强度与抗蠕变性能、高温压缩性能和短时强度等高温力学性能及各自的断裂机制.最后,叙述了该合金系的耐腐蚀性能,并展望了该合金系的研究前景.
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