Abstract

the super plastics of alloys is recently developed method to obtain the optimum plastic property on Ti3Al alloys. On order to research the superplastic distribution with parameters such as nˎm&K the modeling established is analysis and calculated the results, and find the parameters is fit to the curve expressing the high plastic well here. m>K>n is the found turn in these three parameters which causes the super-plasticity effectively. This effect may be studied further to demonstrate it to be effective definitely. The stress under =1.25*E-4 decreases more than half of one that is under =1.25*E-2 in these three statuses as reference. It explains that the high plastic behavior is to be anticipated when strain rate becomes low in this paper. the superplastic behavior is modeled to analyze the phenomenon of plasticity through changing strain rate to be 10%̖ 20% & 30%，strain rate to be 200MPa̖ 300MPa&400MPa as to n & m in Ti3Al alloys. Through observe the curve of n&K it is found that the dependent relation As.> ε> σ=200MPa> σ=300MPa. Meantime the m (n) and K is increasing function relation.