Effects of early transition metal solutes on the D0{sub 3}-B2 critical temperature of Fe{sub 3}Al

Journal Article · Sun Oct 01 04:00:00 EDT 1995 · Acta Metallurgica et Materialia

DOI:https://doi.org/10.1016/0956-7151(95)90171-X· OSTI ID:116134

Anthony, L; Fultz, B ^[1]

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1. California Inst. of Tech., Pasadena, CA (United States). W.M. Keck Labs. of Engineering Materials

The effects of dilute concentrations of the ternary solutes Ti, V, Cr, Zr, Nb, Mo, Hf, Ta, and W on the critical temperature of the D0{sub 3}-B2 transformation in Fe{sub 3}Al were measured by differential thermal analysis (DTA). Additional studies by X-ray diffractometry showed that Mo, Ta, and W atoms occupied predominantly the 4(b) Wyckoff sites in D0{sub 3}-ordered Fe{sub 3}Al. Most solutes caused an increase in the D0{sub 3}-B2 transformation temperature, which was approximately linear in the limit of dilute solute concentrations. The efficacy of a particular ternary element in raising the D0{sub 3}-B2 transformation temperature was shown to be related to its metallic radius. The authors argue that the energetics of atom size mismatch are the major cause of the effects of ternary solutes on the D0{sub 3}-B2 transformation temperature of Fe{sub 3}Al.

• DOE Contract Number: FG03-86ER45270
• OSTI ID: 116134
• Journal Information: Acta Metallurgica et Materialia, Journal Name: Acta Metallurgica et Materialia Journal Issue: 10 Vol. 43; ISSN 0956-7151; ISSN AMATEB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
CRITICAL TEMPERATURE
CRYSTAL STRUCTURE
DIFFERENTIAL THERMAL ANALYSIS
INTERMETALLIC COMPOUNDS
IRON ALLOYS
METALLURGICAL EFFECTS
PHASE TRANSFORMATIONS
SOLUTES
TRANSITION ELEMENTS
X-RAY DIFFRACTION