Microstructure and Strengthening Mechanisms of Oxide Dispersion Strengthened Ferritic Alloy

Abstract:

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Oxide dispersion strengthened (ODS) ferritic alloys of composition Fe-19Cr-0.5Y2O3 have been prepared by mechanical alloying at various heat-treatment conditions to produce a range of grain sizes and dispersed oxide particle size. Fine oxide particles appear to pin grain boundaries and result in inhibition of grain growth in the alloy matrix. Particle strengthening is shown to be a larger component of the material strength, rather than grain boundary strengthening or matrix strength, indicating that the finely dispersed oxide particles contribute very significantly to the total strength of 19Cr-ODS ferritic alloy.

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Periodical:

Edited by:

Ford Lumban Gaol, Mehdi Roopaei, Svetlana Perry and Jessica Xu

Pages:

243-248

DOI:

10.4028/www.scientific.net/AMM.87.243

Citation:

J. H. Lee "Microstructure and Strengthening Mechanisms of Oxide Dispersion Strengthened Ferritic Alloy", Applied Mechanics and Materials, Vol. 87, pp. 243-248, 2011

Online since:

August 2011

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$35.00

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