摘要
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。
Abstract The behaviors of rare earth element Ce in 2090 Al Li alloy have been studied by the method of low frequency internal friction. The results show that trace solution Ce atoms can increase the activation energy of grain boundary, thereby improve the grain boundary strength of alloy. Rare earth element Ce can decrease the tendency of softening of elastic modulus of 2090 Al Li alloy after heat cycle and this will benefit the high temperature mechanical properties.
出处
《机械工程材料》
CAS
CSCD
北大核心
1999年第3期7-9,25,共4页
Materials For Mechanical Engineering
基金
国家自然科学基金
