Copper precipitation in Fe-Cu alloys under electron and neutron irradiation

AV Barashev, SI Golubov, DJ Bacon, PEJ Flewitt, TA Lewis

Research output: Contribution to journalArticle (Academic Journal)peer-review

44 Citations (Scopus)

Abstract

Precipitation of copper-rich clusters is a contribution to in-service hardening of some reactor pressure vessel ferritic steels. At temperatures less than 300 degreesC the precipitates are observed to be about 2 nm in diameter and not to coarsen, at least in the dose range from similar to10(-3) to 10(-2) dpa. As a result the hardening is close to a maximum. This phenomenon is studied here by computer simulations based on the "mean-field" approach for describing microstructural evolution in a binary Fe-Cu alloy. It is shown that the experimental data obtained from electron irradiated material and reactor-neutron irradiated steels have a stage of precipitate evolution intermediate between growth and coarsening. During this stage the size distribution of precipitates broadens while the number density and the mean size remain constant, which explains the observations. The role interstitial atom clusters produced in displacement cascades may have on the kinetics of copper precipitate coarsening is discussed. (C) 2003 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
Translated title of the contributionCopper precipitation in Fe-Cu alloys under electron and neutron irradiation
Original languageEnglish
Pages (from-to)877 - 886
Number of pages10
JournalActa Materialia
Volume52 (4)
Publication statusPublished - 2004

Bibliographical note

Publisher: PERGAMON-ELSEVIER SCIENCE LTD, OXFORD

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