The compression testing at elevated temperatures was carried out for 1235 aluminum alloy prepared by different purification ways with the help of dynamic thermal simulation experimental technology. The material constants of hot deformation have been presented by multivariate regression directly

and effects of inclusion content in 1235 aluminum alloy on the constants were analyzed empathically. The results reveal that purification has the great effects on the materials constant of 1235 aluminum alloy during hot deformation

especially on the hot deformation activation energy

where the better the purification effects

the lower the hot deformation activation energy is. Compared with that of 1235 aluminum alloy prepared by other purification methods

the hot deformation activation energy of the alloy prepared by high-efficiency purification treatment which possesses the lowest inclusion content exhibits the lowest of 149.51 kJ/mol

showing desirable hot plastic performance. Inclusion content makes as a function of the hot deformation energy activation energy

in which with decreasing in inclusion content

the hot deformation activation energy is decreased. Oxidation inclusion in the alloy

such as Al2O3

during hot deformation

can pin the dislocation

restricting the bundle gathering of the dislocation and widening the width of the extending dislocation. Therefore cross-slip of screw-dislocation is not easy to generate by decreasing the fault energy

so hot deformation activation energy is increased.