Radiation-Induced Segregation and Phase Stability in Ferritic–Martensitic Alloy T 91Journal of Nuclear Materials (2011)
AbstractRadiation-induced segregation in ferritic–martensitic alloy T 91 was studied to understand the behavior of solutes as a function of dose and temperature. Irradiations were conducted using 2 MeV protons to doses of 1, 3, 7 and 10 dpa at 400 °C. Radiation-induced segregation at prior austenite grain boundaries was measured, and various features of the irradiated microstructure were characterized, including grain boundary carbide coverage, the dislocation microstructure, radiation-induced precipitation and irradiation hardening. Results showed that Cr, Ni and Si segregate to prior austenite grain boundaries at low dose, but segregation ceases and redistribution occurs above 3 dpa. Grain boundary carbide coverage mirrors radiation-induced segregation. Irradiation induces formation of Ni–Si–Mn and Cu-rich precipitates that account for the majority of irradiation hardening. Radiation-induced segregation behavior is likely linked to the evolution of the precipitate and dislocation microstructures.
Publication DateOctober 1, 2011
Citation InformationJanelle P. Wharry, Zhijie Jiao, Vani Shankar, Jeremy T. Busby, et al.. "Radiation-Induced Segregation and Phase Stability in Ferritic–Martensitic Alloy T 91" Journal of Nuclear Materials Vol. 417 Iss. 1-3 (2011)
Available at: http://works.bepress.com/janelle_wharry/2/