DISLOCATION BEHAVIOR IN THE SUPERPLASTIC DEFORMATION OF ALLOY Al-Li 2091

来源期刊：中国有色金属学报(英文版)1995年第4期

论文作者：Cui Jianzhong Zeng Meiguang Wu Qiuyun Zhang Baojin

文章页码：97 - 99

Key words：Al-Li alloy superplastic deformation dislocation behavior

Abstract: The dislocation behavior in the superplastic deformation of alloy Al-Li 2091 has been studied.Both TEM observation and X-ray diffraction analysis revealed that:in the stuidied range of strain,the amount of dislocation in the grain interior decreases with the increase of strain.There also exist such dislocation configurations as network,subgrain boundaries,dislocation poles,helical dislocation,dislocation ring and grain boundary dislocations.In the softening stage of superplastic deformation, with the increase of strain,the velocity of dislocation motion increases and the activation energy of dislocations decreases.