HIGH-STRAIN-RATE SUPERPLASTICITY OF PARTICULATE-REINFORCED ALUMINUM-MATRIX COMPOSITES

In recent years, there have been a lot of research efforts in studying high-strain-rate superplasticity of aluminum matrix composites. Howev er, the superplastic deformation behavior of the composites has not be en fully understood. Superplastic deformation mechanism in aluminum ma trix composites was considered to be grain boundary sliding and interf acial sliding. In this paper, the model proposed recently by the autho rs to explain the superplastic deformation of a particulate reinforced aluminium matrix composite at temperatures above and below its solidu s temperatures is further developed. The theoretical predictions are i n agreement with the published experimental findings. (C) 1997 Publish ed by Elsevier Science Ltd.