Phase stability and tensile properties of Co-free Al0.5CrCuFeNi2high-entropy alloys

Chun Ng, Sheng Guo, Junhua Luan, Qing Wang, Jian Lu, San-Qiang Shi, C. T. Liu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

71 Citations (Scopus)

Abstract

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 Al0.5CrCuFeNi2alloy. 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.
Original languageEnglish
Pages (from-to)530-537
Number of pages8
JournalJournal of Alloys and Compounds
Volume584
DOIs
Publication statusPublished - 1 Jan 2014

Keywords

  • High entropy alloys
  • Indentation behavior
  • Phase stability
  • Tensile tests
  • Thermodynamics calculations
  • Thermomechanical treatments

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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