Transient stage in low-stress viscous creep of titanium and cobalt

Abstract

Transient creep data recorded during low-stress viscous creep of α-Ti and β-Co have been presented in terms of four important variables, namely (i) prior specimen treatment, (ii) specimen grain size, (iii) test temperature, and (iv) temperature cycling during test. An analysis of the observations provides further experimental evidence for two of the existing notions, namely that dislocation activity and thermal anisotropy are contributory causes of transient creep strains.