Boron strengthening in FeAl
- Dartmouth Coll., Hanover, NH (United States). Thayer School of Engineering
- Oak Ridge National Lab., TN (United States). Metals and Ceramics Div.
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.
- Research Organization:
- Oak Ridge National Lab., Metals and Ceramics Div., TN (United States)
- Sponsoring Organization:
- USDOE Office of Energy Research, Washington, DC (United States)
- DOE Contract Number:
- AC05-96OR22464
- OSTI ID:
- 676870
- Report Number(s):
- ORNL/CP--98993; CONF-981054--; ON: DE99000376; BR: KC0201050; KC0201010
- Country of Publication:
- United States
- Language:
- English
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