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Radiation-Induced Segregation: A Microchemical Gauge to Quantify Fundamental Defect Parameters

Published online by Cambridge University Press:  16 February 2011

E. P. Simonen and
S. M. Bruemmer
E. P. Simonen
Affiliation:
Pacific Northwest Laboratory, P. O. BOX 999/ P8-15, Richland, WA 99352
S. M. Bruemmer
Affiliation:
Pacific Northwest Laboratory, P. O. BOX 999/ P8-15, Richland, WA 99352
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Abstract

Defect kinetic parameters for radiation-induced grain boundary segregation in austenitic stainless alloys are evaluated by comparing model predictions to measured responses. Heavy-ions, neutrons, and proton irradiations having substantial statistical bases are examined. The combined modeling and measurement approach is useful for quantifying fundamental defect parameters. The mechanism evaluation indicates that vacancy migration energies were 1.15 eV or less and the vacancy formation energy at grain boundaries was 1.5 eV. Damage efficiencies of heavy ions and light-water reactor neutrons were about 0.03. Inferred proton damage efficiencies were about 0.15. Segregation measured in an advanced gas-cooled reactor component was much greater than predicted from those parameters alone.

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Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 373: Symposium Y – Microstructure of Irradiated Materials , 1994, 95
Copyright
Copyright © Materials Research Society 1995

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References

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