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Phase stability and tensile properties of Co-free Al 0.5CrCuFeNi2 high-entropy alloys

C. Ng ; Sheng Guo (Institutionen för material- och tillverkningsteknik, Yt- och mikrostrukturteknik) ; J. Luan ; Q. Wang ; J. Lu ; S. Shi ; C. Liu
Journal of Alloys and Compounds (0925-8388). Vol. 584 (2014), p. 530-537.
[Artikel, refereegranskad vetenskaplig]

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. © 2013 Published by Elsevier B.V.

Nyckelord: High entropy alloys , Indentation behavior , Phase stability , Tensile tests , Thermodynamics calculations , Thermomechanical treatments



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Denna post skapades 2013-11-15. Senast ändrad 2015-12-17.
CPL Pubid: 186877

 

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Institutioner (Chalmers)

Institutionen för material- och tillverkningsteknik, Yt- och mikrostrukturteknik (2005-2017)

Ämnesområden

Materialvetenskap
Metallurgi och metalliska material

Chalmers infrastruktur