Understanding hot workability of power plant P92 creep resistant steels using dynamic material modelling (DMM) and microstructural evolution

This study reports the hot workability of two P92 creep-resistant steels with different chromium and tungsten contents, all within ASME specification. These are used in manufacturing modern power plant boiler pipes. Uniaxial compression tests were done using a Gleeble® 3500 thermal-mechanical equipment. The test conditions were: deformation temperature 850–1000 °C strain rate 0.1–10 s−1. Experimental flow stress values obtained from isothermal to construct processing maps employing dynamic material model approach. stress-strain curve results exhibited recovery characteristics. increased decrease or an increase rate. correlation between microstructure deformed samples reveals that optimal window for occurred at 850 1000 lower 0.1 s−1 studied. regions had maximum efficiency 26% (P92-A steel) 19% (P92-B steel). findings this have provided new approach process parameter optimisation technique industrial metal forming steels. Hence, reducing time cost.