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Article
Radiation-Induced Segregation and Phase Stability in Ferritic–Martensitic Alloy T 91
Journal of Nuclear Materials (2011)
  • Janelle P. Wharry, University of Michigan - Ann Arbor
  • Zhijie Jiao, University of Michigan - Ann Arbor
  • Vani Shankar, University of Michigan - Ann Arbor
  • Jeremy T. Busby, Oak Ridge National Laboratory
  • Gary S. Was, University of Michigan - Ann Arbor
Abstract
Radiation-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 Date
October 1, 2011
Citation Information
Janelle 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/