Investigation of Ordering Kinetics in Deformed and Annealed Cu₃Au

Abstract

It is obvious that knowledge about the deformation behaviour of structural materials is essential for their adequate application. In an early review Cahn¹ compiled several studies of solid solutions and intermetallics which investigated the correlation of order with mechanical properties. Roessler et al.² found for Cu₃Au rolled to about 60% reduction that mechanical deformation privented ordering from proceeding quickly by domain growth. In a detailed study, Hutchinson et al.³ showed that recrystallization is considerably slowed in the ordered state because of the reduced growth rate of recrystallized grains, whereas recovery is not affected within experimental accuracy. Cahn and Westmacott⁴ in annealing Cu₃Au after rolling to more than 90% reduction observed recrystallization well below order transformation temperature T₁; the new grains containing very coarse antiphase domains. A review of recovery and recrystallization in deformed intermetallics is given by Cahn⁵, who recently showed how ordered domains form at the moving grain boundary when a heavily rolled Cu₃Au sample is annealed slightly below T₁ ⁶.