Observation of a metastable B2 phase in rapidly solidified ribbons of NbAl alloys

• Published in: Scripta metallurgica et materialia Vol. 29; no. 10; pp. 1271 - 1274
• Main Authors: Kohmoto, H., Shyue, J., Aindow, M., Fraser, H.L.
• Format: Journal Article
• Language: English
• Published: Seoul Elsevier B.V 15.11.1993; Oxford Pergamon Press; New York, NY
• Subjects: 360102 - Metals & Alloys- Structure & Phase Studies; ALLOY SYSTEMS; ALLOYS; ALUMINIUM ALLOYS; Applied sciences; BINARY ALLOY SYSTEMS; Cross-disciplinary physics: materials science; rheology; ELECTRON MICROSCOPY; Exact sciences and technology; MATERIALS SCIENCE; Metals. Metallurgy; MICROSCOPY; NIOBIUM ALLOYS; Phase diagrams and microstructures developed by solidification and solid-solid phase transformations; PHASE TRANSFORMATIONS; Physics; SOLIDIFICATION; TEMPERATURE DEPENDENCE; TRANSMISSION ELECTRON MICROSCOPY; Binary alloys; Transmission electron microscopy; Niobium base alloys; Aluminium alloys; Phase composition; Metastable phases; Rapid solidification; Melt spinning; Experimental study; Microstructure; Heat treatments; Transition element alloys
• ISSN: 0956-716X
• DOI: 10.1016/0956-716X(93)90122-9

A TEM study has been conducted of the phases in melt-spun ribbons of binary Nb-Al alloys, giving attention to whether the A2 or B2 version forms upon rapid solidification. The effects of heat treatment are noted, with a view to the significance of observed effects to the origins of the B2 phase. While the A2 structure is exhibited in as-spun ribbon grains, heat treatment results in A2, A2 + B2, and B2 + A15, respectively, in the cases of 9.1, 13.5, and 16.9 percent Al Nb-Al compositions. (AIAA)