Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 584, Issue -, Pages 530-537Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2013.09.105
Keywords
High entropy alloys; Thermomechanical treatments; Phase stability; Thermodynamics calculations; Tensile tests; Indentation behavior
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Funding
- Research Grant Council (RGC) [CityU/521411]
- Hong Kong Government, through the General Research Fund (GRF) [CityU/521411]
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High-entropy alloys (HEAs) are becoming new research frontiers in the metallic materials field. The phase stability of HEAs is of critical significance, but a convincing understanding on it has been somewhat held back by the slow diffusion kinetics, which prevents the completion of diffusion assisted phase transformations toward the equilibrium state. Here a unique methodology, combining both the thermomechanical treatments and thermodynamic calculations, was employed to reveal the phase stability of HEAs, exemplified using the newly developed Al0.5CrCuFeNi2 alloy. The metastable nature of the solid solution phases in this high-entropy alloy was uncovered through thermomechanical treatments induced phase transformations, and supported by the thermodynamic calculations. Meanwhile, the tensile properties for both the as-cast and thermomechanically treated alloys were measured, and correlated to their indentation behavior. (C) 2013 Elsevier B.V. All rights reserved.
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