Influence of cobalt alloying on structure and long-term strength of Al–Cu–Mg–Ag alloy system

Abstract

A determining factor for application of new materials for structural elements exposed to processing and operational heating is their thermal stability and operability at increased temperatures. This article presents the results of investigation into the influence of a minor addition of cobalt on modification of the microstructure of cold rolled sheets after thermal strengthening treatment. Furthermore, improvement of long term strength at increased temperature is demonstrated, which makes it possible to use the addition of cobalt in development of heat-resistant aluminum alloys.