High temperature creep of ordered and disordered beta brass-II. Internal stress

Abstract

The internal stress σi was measured with strain transient dip tests in ordered and disordered beta brass during high temperature steady state creep. The normalized internal stress σi σ, where σ is the applied stress, in both ordered and disordered beta brass is small at the larger stress levels. This result agrees well with our theory of internal stress for class I alloys. The Cottrell-Jaswon microcreep mechanism and the antiphase boundary microcreep mechanism are most likely to control the viscous glide of dislocations in ordered beta brass. In disordered beta brass the Cottrell-Jaswon microcreep mechanism most likely controls the glide motion of the dislocations. © 1986.