High-strain-rate superplasticity of an AL2009-SlCw composite

摘要

Discontinuously reinforced aluminium composites are considered to be excellent candidates for aerospace and automobile industries. However, their formability and machinability needs to be understood first before they can be widely used in these industries. Therefore, a lot of research effort has been spent in the study of the superplasticity of such composites over the past decade. The superplastic capability of many discontinuously reinforced aluminium matrix composites [1-7] has been discovered. Al 2009/SiCw composite is attractive for its high strength, stiffness and thermal stability and an ideal substitute for titanium used at service temperatures betwen 366 and 450 K. Also this material can be used in the sporting goods industry. Up to the present day, the superplastic deformation of Al 2009-20 vol% SiCw composite has not been investigated. In the present study, the superplastic behaviour of a SiC whisker reinforced 2009 aluminium matrix composite has been investigated.