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Please use this identifier to cite or link to this item: https://dspace.lboro.ac.uk/2134/17739

Title: An in situ powder neutron diffraction study of nano-precipitate formation during processing of oxide-dispersion-strengthened ferritic steels
Authors: Zhang, Hongtao
Gorley, Michael J.
Chong, Kok Boon
Fitzpatrick, Michael E.
Roberts, Steve G.
Grant, Patrick S.
Keywords: Neutron diffraction
Mechanical alloying
Ferritic steels
Oxide-dispersion strengthened (ODS) alloy
Precipitation
Issue Date: 2013
Publisher: © Elsevier
Citation: ZHANG, H. ... et al, 2013. An in situ powder neutron diffraction study of nano-precipitate formation during processing of oxide-dispersion-strengthened ferritic steels. Journal of Alloys and Compounds, 582, pp.769-773
Abstract: The evolution of phases in a Fe-14Cr-10Y2O3 (wt.%) oxide-dispersion-strengthened ferritic steel during mechanical alloying (MA) and subsequent annealing was studied by high resolution powder neutron diffraction, with emphasis on the kinetics of oxide-based nanoprecipitate formation. Y2O3 particles were almost dissolved into the ferritic matrix during MA. The formation of nano-precipitates was then observed by in-situ thermo-diffraction experiments during annealing of as-milled powder above 900oC, supported by scanning electron microscopy. This revealed nano-precipitate coarsening with increasing annealing temperature. Powder microhardness was measured at various processing stages, and hardness changes are discussed in terms of the measured phase fractions, crystallite size and lattice strain at different temperatures and times.
Description: This paper was accepted for publication in the Journal of Alloys and Compounds. The final published version is available at: http://dx.doi.org/10.1016/j.jallcom.2013.08.069
Version: Accepted for publication
DOI: 10.1016/j.jallcom.2013.08.069
URI: https://dspace.lboro.ac.uk/2134/17739
Publisher Link: http://dx.doi.org/10.1016/j.jallcom.2013.08.069
ISSN: 0925-8388
Appears in Collections:Published Articles (Materials)

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