Effects of deformation temperature and strain rate on deformation behavior of semi-solid 6063 alloy were investigated on the Gleeble 3800 thermal-mechanical simulator at 615

6

30℃ and 0.1

5

s-1. The results show that flow stress of semi-solid aluminum alloy is decreased with increasing in deformation temperature and it is increased with increasing in strain rate. The deformation temperature and strain rate have the significant effects on the peak stress of 6063 alloy rather than steady flow stress. The natural logarithm of the sine equation of alloy flow stress and reciprocal of absolute temperature meets linear relationship

and relationship between flow stress and strain rate meets hyperbolic sine equation. On the basis of the experimental data from semi-solid 6063

a constitutive equation was established by means of the multi-variable regression to describe the relation between the processing parameters and flow stress. The model exhibits desirable precision by comparing calculated results with experimental ones.