中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 7 No. 3 September 1997 |
（1.School of Materials Science and Engineering; Harbin Institute of Technology; Harbin 150001 ;
2.Beijing Research Institute of Aeronautical Materials; Beijing 100095）
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.
Key words: Al Li alloy internal friction of grain boundary microstructure heat treatment
