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Radiation-Induced Minor Element Segregation at Austenitic Stainless Steel Grain Boundaries

Published online by Cambridge University Press:  15 February 2011

E. P. Simonen  and
S. M. Bruemmer
E. P. Simonen
Affiliation:
Pacific Northwest National Laboratory, P. 0. BOX 999/ P8-15, Richland, WA 99352
S. M. Bruemmer
Affiliation:
Pacific Northwest National Laboratory, P. 0. BOX 999/ P8-15, Richland, WA 99352
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Abstract

Measurement of minor element compositions at irradiated grain boundaries in austenitic stainless steels indicates that Si is the only element that significantly responds to radiation-induced segregation. Other minor elements, such as P or S, do not exhibit elevated grain boundary concentrations after irradiation. A rate theory evaluation of segregation is in accord with ioninduced Si enrichment, but reveals complexities in the interpretation of extrapolating behavior from ion-irradiation to neutron-irradiation behavior. The model calibrated to measured high-rate, ioninduced segregation greatly overestimates measured low-rate, neutron-irradiation segregation of Si.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 439: Symposium B – Microstructure Evolution During Irradiation , 1996 , 569
Copyright
Copyright © Materials Research Society 1997

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