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High Spatial Resolution X-ray Microanalysis of Radiation-Induced Segregation in Proton-Irradiated Stainless Steels

Published online by Cambridge University Press:  10 February 2011

E.A. Kenik ,
J.T. Busby  and
G.S. Was
E.A. Kenik
Affiliation:
Oak Ridge National Laboratory, Oak Ridge, TN 37831-6376, kenikea@ornl.gov
J.T. Busby
Affiliation:
University of Michigan, Ann Arbor, MI 48109-2104
G.S. Was
Affiliation:
University of Michigan, Ann Arbor, MI 48109-2104
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Abstract

The spatial redistribution of alloying elements and impurities near grain boundaries in several stainless steel alloys arising from non-equilibrium processes have been measured by analytical electron microscopy (AEM) in a field emission scanning transmission electron microscope. Radiation-induced segregation (RIS) has been shown to result in significant compositional changes at point defects sinks, such as grain boundaries. The influence of irradiation dose and temperature, alloy composition, prior heat treatment, and post-irradiation annealing on the grain boundary composition profiles have been investigated. Understanding the importance of these microchemical changes relative to the radiation-induced microstructural change in irradiation-assisted stress corrosion cracking (IASCC) of the irradiated materials is the primary goal of this study.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 589 , 1999 , 295
Copyright
Copyright © Materials Research Society 2001

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