In order to study the warm
deformation mechanism of 20CrMnTi steel,the relationship of the deformation temperature and deformation resistance of the
steel in the
Dual Phase Region', 1, 1612525)"; href="/tags/dual-phase-region/">dual phase region was studied by isothermal compression and analyzed using metallurgical methods.The results show that when deformed at temperatures below Ac_(1),the
dynamic recovery of
ferrite and the spheroidization of Fe_3C in pearlite result in the flow stress peak at a small strain,then the flow stress falls continuously.When deformed at temperatures above Ac_(1),the phase transformation of ferrite induced by deformation results in decreasing the flow stress at 770 ℃;the dynamic recovery of ferrite and dynamic recrystallization of austenite in the dual phase region result in a dynamic balance between softening and hardening,making the flow stress level stabilize,when the strain reaches a certain value at 800 ℃;in addition,the phase transformation induced by deformation and the dynamic recrystallization result in the formation of ultrafine grains.
More abstracts about the Mechanical behaviour and microstructure of 20CrMnTi steel during dual phase deformation