Optimization of hot working parameters for thermo-mechanical processing of modified 9Cr-1Mo (P91) steel employing dynamic materials model

► Intrinsic workability of P91 steel has been studied in the hot working domain. ► Experimental stress-strain data have been generated using hot compression tests. ► Processing map based on DMM have been developed using the experimental data. ► The domains of the processing map have been validated using the optical micrographs. ► Activation energy map has been used to finalize the optimum hot working parameters.