Phase diagrams, superlattices and antiphase domains of Fe[sub 3]Al[sub x], 0. 75 [le] x [le] 1. 3, investigated by neutron scattering

Journal Article · Tue Mar 01 00:00:00 EST 1994 · Acta Metallurgica et Materialia; (United States)

DOI:https://doi.org/10.1016/0956-7151(94)90270-4· OSTI ID:5158992

Hilfrich, K ^[1]; Nembach, E ^[2]; Petry, W; Schaerpf, O ^[3]

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1. Inst. fur Metallforschung der Univ., Muenster (Germany) Inst. fur Werkstofforschung des GKSS-Forschungszentrums, Geesthacht (Germany)
2. Inst. fur Metallforschung der Univ., Muenster (Germany)
3. Inst. Laue Langevin, Grenoble (France)

The states of order of iron-aluminum-alloys with compositions around Fe[sub 3]Al have been investigated by neutron scattering. The results lead to the following description of their structures: (i) these alloys have the long-range ordered DO[sub 3] structure up to the following temperatures: Fe-0.2Al up to at least 873 K, Fe-0.25Al and Fe-0.3Al up to about 1,050 K, atomic fractions of Al are quoted; (ii) some phase boundaries shown in the current Fe-Al phase diagram turned out to be no phase boundaries at all, but to have bearing only on the size of antiphase domains. There are critical temperatures above which antiphase domain boundaries are in thermodynamic equilibrium. The present results suggest revisions of the current Fe-Al phase diagram.

• OSTI ID: 5158992
• Journal Information: Acta Metallurgica et Materialia; (United States), Vol. 42:3; ISSN 0956-7151
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
PHASE DIAGRAMS
IRON BASE ALLOYS
CRITICAL TEMPERATURE
CRYSTAL LATTICES
ALLOYS
CRYSTAL STRUCTURE
DIAGRAMS
IRON ALLOYS
PHYSICAL PROPERTIES
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
360102* - Metals & Alloys- Structure & Phase Studies