CONSTANT STRUCTURE CREEP EXPERIMENTS IN ALUMINUM, ALMG AND ALZN SOLID-SOLUTIONS

Differences in constant structure creep behaviour of pure aluminum and Al-5.5wt.%Mg and Al-14wt.%Zn solid solutions, i.e. typical representa nts of metal class M and solid solution class A creep behaviour, were investigated by means of an analysis of the immediate strain rate resp onse to sudden applied stress changes performed in the steady-state cr eep region. Some qualitative conclusions resulting from the investigat ion are briefly presented indicating a possibility to interpret the di fferent behaviour in aluminum and solid solution by activity of one or two deformation mechanisms, respectively. (C) 1997 Elsevier Science S .A.