Production of Tungsten Dispersion Cu-1.0vol%W Alloy Plates and their Mechanical Properties

Abstract

Tungsten dispersion Cu-1.0vol%W plates were prepared by conventional sintering of mixed powder compacts of Cu and W. Prepared plates were subjected to cyclic treatment of cold rolling and annealing to achieve further densification. In this study, the densification due to cold rolling and mechanical properties of cold rolled plates were examined in comparison with those of oxide dispersion Cu-1.0vol%Y₂O₃ prepared by the same methods as the tungsten dispersion copper plate.
In both W and Y₂O₃ dispersion Cu plates, the density increased effectively by repeating the treatment of cold rolling and annealing. However, it has been clarified to be difficult to attain the theoretical density by this method. Mechanical properties of both Cu plates were improved with the increase of density, but elongation property tended to become saturated or decreased when the reduction of thickness exceeded 50%.