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Modeling the Post-Yield Flow Behavior After Neutron and Electron Irradiation of Steels and Iron-Base Alloys

Published online by Cambridge University Press:  15 February 2011

R.J. Dimelfi ,
D.E. Alexander  and
L.E. Rehn
R.J. Dimelfi
Affiliation:
Reactor Engineering Division, Argonne National Laboratory, Argonne, IL 60439, [email protected]
D.E. Alexander
Affiliation:
Materials Science Division, Argonne National Laboratory, Argonne, IL 60439
L.E. Rehn
Affiliation:
Materials Science Division, Argonne National Laboratory, Argonne, IL 60439
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Abstract

Irradiation hardening is an issue of practical importance as it relates to the remanent life and the nature of failure of reactor components exposed to displacement-producing radiation. Understanding these phenomena requires studies of fundamental microstructural mechanisms of hardening. In this paper, we analyze the tensile behavior of pressure vessel steels (A212B and A350) irradiated by neutrons and electrons. The results show that the post-yield true stress/true strain behavior can provide fingerprints of the different hardening effects that result from irradiation by the two particles, which suggests correspondingly different hardening microstructures for the two particles. Microstructurally-based models for irradiation-induced yield strength increases, combined with a model for strain hardening, are used to make predictions of the different effects of irradiation by the two particles on the entire flow curve that agree well with data.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 540: Symposium N / Microstructural Processes in Irradiated Materials , 1998 , 463
Copyright
Copyright © Materials Research Society 1999

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