Abstract

The superplastic behavior is modeled to analyze the phenomenon of plasticity through changing strain rate to stress and m as to K & n̖ ̖ ε. Through observing the curve of stress &strain rate it is found that the dependent relation as m> >n turn from strain rate& stress. It may be obtained that σ>K. Q will increase somewhat when temperature k increases. Meantime according to different strain rate it has various value Q. The highest one is =1.25E-3 and 1, 25E-4; then 1.5E-1 and 1.25E-2; then 1.25E-4 and 1.65E-5; at last 1.25E-2 and 1.65E-3.

Keywords: model?superplastic deformation?K & n? ? ??stress?strain rate; m; constant A/dp?creep?activated energy Q?TiAl?function