4.7 Article

α′ precipitation in neutron-irradiated Fe-Cr alloys

Journal

SCRIPTA MATERIALIA
Volume 74, Issue -, Pages 48-51

Publisher

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2013.10.001

Keywords

Fe-Cr; Neutron irradiation; Precipitation; Atom probe tomography

Funding

  1. University of Michigan College of Engineering
  2. DOE Office of Nuclear Energy's Nuclear Energy University Program at the University of Michigan
  3. DOE Office of Nuclear Energy's Nuclear Energy University Program at University of California-Santa Barbara Colleges of Engineering
  4. ATR-NSUF program

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A series of model Fe-Cr alloys containing 3-18 at.% Cr was neutron irradiated at a nominal temperature of 563 K to 1.82 dpa. Solute distributions were analyzed by atom probe tomography, which revealed alpha' precipitation for alloys containing more than 9 at.% Cr. Both the Cr concentration dependence of alpha' precipitation and the measured matrix compositions are in agreement with the recently published Fe-Cr phase diagrams. An irradiation-accelerated precipitation process is strongly suggested. (C) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

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