Boron strengthening in FeAl

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The effect of boron on the strength of B2-structured FeAl is considered as a function of composition, grain size and temperature. Boron does not affect the concentrations of antisite atoms or vacancies present, with the former increasing and the latter decreasing with increasing deviation from the stoichiometric composition. When vacancies are absent, the strength increase per at. % B per unit lattice strain, {Delta}{sigma}/({Delta}c x {epsilon}) increases with increasing aluminum concentration, but when vacancies are present (>45 at. % Al), {Delta}{sigma}/({Delta}c x {epsilon}) decreases again. Boron increases grain size strengthening in FeAl. B strengthening is roughly independent of temperature up ... continued below

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15 p.

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Baker, I.; Li, X.; Xiao, H.; Klein, O.; Nelson, C.; Carleton, R.L. et al. November 1, 1998.

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Description

The effect of boron on the strength of B2-structured FeAl is considered as a function of composition, grain size and temperature. Boron does not affect the concentrations of antisite atoms or vacancies present, with the former increasing and the latter decreasing with increasing deviation from the stoichiometric composition. When vacancies are absent, the strength increase per at. % B per unit lattice strain, {Delta}{sigma}/({Delta}c x {epsilon}) increases with increasing aluminum concentration, but when vacancies are present (>45 at. % Al), {Delta}{sigma}/({Delta}c x {epsilon}) decreases again. Boron increases grain size strengthening in FeAl. B strengthening is roughly independent of temperature up to the yield strength peak but above the point, when diffusion-assisted deformation occurs, boron strengthening increases dramatically.

Physical Description

15 p.

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OSTI as DE99000376

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  • 1998 Minerals, Metals and Materials Society (TMS) fall meeting, Rosemont, IL (United States), 11-15 Oct 1998

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  • Other: DE99000376
  • Report No.: ORNL/CP--98993
  • Report No.: CONF-981054--
  • Grant Number: AC05-96OR22464
  • DOI: 10.2172/676870 | External Link
  • Office of Scientific & Technical Information Report Number: 676870
  • Archival Resource Key: ark:/67531/metadc706845

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Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • November 1, 1998

Added to The UNT Digital Library

  • Sept. 12, 2015, 6:31 a.m.

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  • Nov. 3, 2016, 6:58 p.m.

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Baker, I.; Li, X.; Xiao, H.; Klein, O.; Nelson, C.; Carleton, R.L. et al. Boron strengthening in FeAl, report, November 1, 1998; Tennessee. (digital.library.unt.edu/ark:/67531/metadc706845/: accessed October 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.