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运用低频内耗技术研究了稀土元素Ｃｅ在２０９０铝锂合金中的行为。结果表明，微量固溶的Ｃｅ可提高合金晶界激活能，从而改善合金晶界强度；稀土元素Ｃｅ可减小合金热循环模量软化倾向，有利于合金高温性能的提高。
Low-frequency internal friction technique was used to study the behavior of rare earth element Ce in 2090 Al-Li alloy. The results show that Ce can improve the grain boundary activation energy and improve the grain boundary strength of the alloy. Ce can reduce the softening tendency of the alloy’s thermal cycle modulus and improve the high temperature performance of the alloy.