ALCHEMI study of site distributions of 3d-transition metals in B2-ordered iron aluminides

Journal Article · Mon Sep 01 00:00:00 EDT 1997 · Acta Materialia

DOI:https://doi.org/10.1016/S1359-6454(97)00042-6· OSTI ID:540965

Anderson, I M ^[1]

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1. Oak Ridge National Lab., TN (United States). Metals and Ceramics Div.

ALCHEMI has been used to determine the site distributions of the 3d-transition metals Me = {l_brace}Ti, V, Cr, Mn, Co, Ni, Cu{r_brace} in B2-ordered iron aluminides of stoichiometry Fe{sub 50}Al{sub 45}Me{sub 5}. These alloying additions exhibited an increasing Fe-site preference with increasing atomic number. Elements Co, Ni and Cu were found to occupy the Fe-site exclusively, displaying 10% of the Fe host element to the Al anti-site. None of the alloying elements exhibited an exclusive Al-site preference. The element Ti exhibited the largest Al-site occupancy, with {approximately}85% of the alloying element occupying the Al site. The residual Fe-site occupancy (15%) can be attributed to the kinetics of the site-equilibration mechanism.

• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC05-96OR22464
• OSTI ID: 540965
• Journal Information: Acta Materialia, Journal Name: Acta Materialia Journal Issue: 9 Vol. 45; ISSN 1359-6454; ISSN ACMAFD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
CRYSTAL DEFECTS
CRYSTAL LATTICES
CRYSTAL STRUCTURE
DIFFUSION
INTERMETALLIC COMPOUNDS
IRON ALLOYS
STOICHIOMETRY
TRANSITION ELEMENT ALLOYS
VACANCIES