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Title: Effects of solute trapping on solidification path in Ta-rich Ta-Al-Fe ternary alloys under rapid freezing
Authors: D'Souza, N.
Feitosa, L. M.
West, G. D.
Jones, N. G.
Dong, H. B.
First Published: 13-Dec-2016
Publisher: Elsevier
Citation: Journal of Alloys and Compounds, 2017, 698, pp. 433-441
Abstract: The solidification sequence of Ta-rich Ta-Al-Fe alloys was examined under rapid freezing processes, arc melting and splat cooling techniques. It is found that loss of interfacial equilibrium results in an extended solubility of Al (up to 15 at. %) and a lower Fe content in primarily Ta phase (A2) in arc melted samples. Trapping of Al in the primary phase leads to a deviation of the solidification path from equilibrium prediction. When Al content is less than 10 at. % Al and Fe content is less than 4 at. % in the primary phase, the peritectic reaction, L + A2 → σ, is suppressed and instead the eutectic reaction, L → A2 + μ takes place following primary freezing. It is also found that under splat cooling conditions extended solute solubility occurs in μ phase formed via a eutectic reaction.
DOI Link: 10.1016/j.jallcom.2016.12.149
ISSN: 0925-8388
eISSN: 1873-4669
Version: Post-print
Status: Peer-reviewed
Type: Journal Article
Rights: Creative Commons “Attribution Non-Commercial No Derivatives” licence CC BY-NC-ND, further details of which can be found via the following link: Archived with reference to SHERPA/RoMEO and publisher website.
Appears in Collections:Published Articles, Dept. of Engineering

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