Redetermination of internal stress during creep of Al-5.5 at.-%Mg alloy at high temperatures

Abstract

The rate of creep of AI-Mg solid solutions at high temperatures has been concluded to be controlled by the viscous glide motion of dislocations. In those studies the average internal stress, which is one of the most important parameters in creep, was determined by the stress-transient dip-test. The method used has now been improved by employing a back-extrapolation technique with which the differences in creep behaviour between many pure metals and AI-Mg alloys can clearly be recognized.