Creep mechanisms in 6246 titanium alloy monitored by stress change testing

Abstract

The transient strain dip test was applied to a commercial titanium alloy. Incubation times were recorded while a positive creeprate was re-established. The incubation times were much longer than those recorded for pure metals. Negative creep responses were also observed and associated with reverse yielding during the stress reduction process. It is proposed that the length of theincubation period is determined by a thermally activated recovery mechanism. An activation energy which is broadly comparable to that observed elsewhere during hot compression testing of the same alloy was monitored.