EFFECT OF HEAT TREATMENT ON INTERNAL FRICTION OF GRAIN BOUNDARY IN 2091 Al-Li ALLOY

来源期刊：中国有色金属学报(英文版)1997年第3期

论文作者：Sun Dongli Yang Dezhuang Yang Zhengyao Zhou Aijun

文章页码：119 - 123

Key words：Al-Li alloy； internal friction of grain boundary； microstructure； heat treatment

Abstract: The grain boundary relaxation and microstructures of 2091 alloy under different heat treatment conditions were studied by means of internal friction test and TEM analysis. The results showed that the grain boundary relaxation exists in the alloy under as quenched and aged conditions. The internal friction of grain boundary is mainly affected by the existence form and segregation degree of alloying and impurity elements in grain boundaries, and it is affected neither by quenching speed nor by a few amount of torsion deformation because they are not related to the grain boundary state.