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研究了在铝-锂-铜-镁-锆合金中添加微量稀土元素对其凝固组织的影响.试验结果表明,稀土元素可以细化晶粒,显著减小二次枝晶臂间距,抑制合金元素的微观偏析,改善有害杂质铁的分布.
The effects of trace rare earth elements addition on the solidification microstructure of aluminum-lithium-copper-magnesium-zirconium alloys were studied.The experimental results show that the rare earth elements can refine the grains and significantly reduce the secondary dendrite arm spacing and inhibit alloying elements Micro-segregation, to improve the distribution of harmful impurities in iron.