Hot deformation behavior of micro-alloyed steel using processing maps developed with different constitutive equations

The hot workability of microalloyed steel was studied in the deformation temperature range 850?1200?C and strain rate 0.001-100s-1. constitutive relation flow stress with temperature, established to construct processing maps steel. were constructed using conventional power law, integral method, Arrhenius equations. developed used predict optimal conditions validated metallurgical examinations. safe regime for working experimental found be intermediate temperature-strain (1000-1150?C;0.001-10 s-1), where process dominated by dynamic recrystallization recovery austenitic phase. map equations increased continuously an increase decrease it did not reveal relevant information respect rate. behavior affected both which explained detail through microstructural examination.