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Metals and Materials International

, Volume 25, Issue 5, pp 1135–1144 | Cite as

Evolution of Microstructures and Properties in AlxCrFeMn0.8Ni2.1 HEAs

  • Xu Chen
  • Di Gao
  • Jia Xuan Hu
  • Ye LiuEmail author
  • Chang Ping Tang
Article
  • 121 Downloads

Abstract

The microstructures, compression and corrosion behaviors of the as-cast AlxCrFeMn0.8Ni2.1 high-entropy alloys (0 ≤ x ≤ 2.3) were investigated in this paper. It was found that the crystal structure changed from initial dual FCC structure to mixed FCC and BCC structure, then to BCC structure as the increasing of Al content. Al0.8CrFeMn0.8Ni2.1 alloy exhibited a typical spinodal structure consisting of alternating two phases microstructure. Moreover, sunflower-like microstructure was obtained in the as-cast AlxCrFeMn0.8Ni2.1 alloys (1.0 ≤ x ≤ 2.0). With the increasing of Al, the macrohardness increased while the plasticity decreased in the alloys. The addition of an appropriate amount of Al could improve the compressive fracture strength of the alloys. In addition, the corrosion resistance deteriorated slightly with the increasing of Al in 1 mol/L NaCl solution.

Keywords

High-entropy alloys As-cast microstructure Compressive properties Corrosion properties 

Notes

Acknowledgements

The authors are grateful for the financial support from the fund of National Natural Science Foundation of China (51604240), Natural Science Foundation of Hunan Province (2016JJ3121), and General Project of the Education Department of Hunan Province (15C1307, 15C1308).

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Copyright information

© The Korean Institute of Metals and Materials 2019

Authors and Affiliations

  • Xu Chen
    • 1
    • 2
  • Di Gao
    • 1
    • 2
  • Jia Xuan Hu
    • 1
    • 2
  • Ye Liu
    • 1
    • 2
    Email author
  • Chang Ping Tang
    • 3
  1. 1.Key Laboratory of Materials Design and Preparation Technology of Hunan Province, School of Materials Science and EngineeringXiangtan UniversityXiangtanPeople’s Republic of China
  2. 2.Hunan Provincial Key Laboratory of Thin Film Materials and Devices, School of Materials Science and EngineeringXiangtan UniversityXiangtanPeople’s Republic of China
  3. 3.School of Materials Science and EngineeringHunan University of Science and TechnologyXiangtanPeople’s Republic of China

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