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Materials 2018, 11(2), 260; https://doi.org/10.3390/ma11020260

Kinetic Phase Diagrams of Ternary Al-Cu-Li System during Rapid Solidification: A Phase-Field Study

1
State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China
2
Institute of Problem of Chemical Physics, Russian Academy of Science, Moscow Region, Chernogolovka 142432, Russia
*
Author to whom correspondence should be addressed.
Received: 26 December 2017 / Revised: 31 January 2018 / Accepted: 5 February 2018 / Published: 8 February 2018
(This article belongs to the Special Issue Theory, Experiment and Modelling of the Dynamic Response of Materials)
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Abstract

Kinetic phase diagrams in technical alloys at different solidification velocities during rapid solidification are of great importance for guiding the novel alloy preparation, but are usually absent due to extreme difficulty in performing experimental measurements. In this paper, a phase-field model with finite interface dissipation was employed to construct kinetic phase diagrams in the ternary Al-Cu-Li system for the first time. The time-elimination relaxation scheme was utilized. The solute trapping phenomenon during rapid solidification could be nicely described by the phase-field simulation, and the results obtained from the experiment measurement and/or the theoretical model were also well reproduced. Based on the predicted kinetic phase diagrams, it was found that with the increase of interface moving velocity and/or temperature, the gap between the liquidus and solidus gradually reduces, which illustrates the effect of solute trapping and tendency of diffusionless solidification. View Full-Text
Keywords: Al-Cu-Li; rapid solidification; kinetic phase diagram; phase-field modeling Al-Cu-Li; rapid solidification; kinetic phase diagram; phase-field modeling
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Yang, X.; Zhang, L.; Sobolev, S.; Du, Y. Kinetic Phase Diagrams of Ternary Al-Cu-Li System during Rapid Solidification: A Phase-Field Study. Materials 2018, 11, 260.

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