Intragranularly Nucleated Austenite in a 2205 Duplex Stainless Steel
The effect of the degree of supersaturation in a coarse-grained h-ferrite matrix on the consequent isothermal transformation of h-ferrite to austenite at 1150‖ in a 2205 duplex stainless steel has been investigated. The results indicate that rapid cooling (at the cooling rate 100‖/s) to the ambient temperature after 135P‖ solution treatment of h-ferrite matrix leads to a very high supersaturated solid solution state, which significantly enhances the formation of the intragranularly nucleated austenite in the subsequent isothermal transformation at 1150‖. The feature of the intragranularly nucleated austenite has been revealed; it appears that after the initial nucleation events for intragranularly nucleated austenite, subsequent small particles of austenite can form sympathetically on the ferrite/austenite interface.
T. Chandra, K. Tsuzaki, M. Militzer , C. Ravindran
C.Y. Chen et al., "Intragranularly Nucleated Austenite in a 2205 Duplex Stainless Steel", Materials Science Forum, Vols. 539-543, pp. 4881-4886, 2007