Formation of chromium-iron carbide by carbon diffusion in AlₓCoCrFeNiCu high-entropy alloys

Author

Mohsen Beyramali Kivy
Caitlin S. Kriewall
Mohsen Asle Zaeem, Missouri University of Science and TechnologyFollow

Abstract

Effect of the addition of carbon on phase formations in Al_xCoCrFeNiCu (x = 0.3, 1.5, 2.8) high-entropy alloys (HEAs) was studied. Free diffusion of carbon from graphite crucible resulted in the partitioning of the entire Cr from the matrix and the formation of the (Cr,Fe)₂₃C₆ phase in all HEAs. No other metal-carbide phase was detected. The formation of (Cr,Fe)₂₃C₆ enhanced the overall hardness of the HEAs. By increasing the amount of Al, the Cr amount decreased resulting in the reduction of carbon diffusion and volume fraction of the (Cr,Fe)₂₃C₆ phase in HEAs. The hardness of matrix phases and the overall hardness of HEAs increased with an increase in the amount of Al.

Recommended Citation

M. Beyramali Kivy et al., "Formation of chromium-iron carbide by carbon diffusion in AlₓCoCrFeNiCu high-entropy alloys," Materials Research Letters, vol. 6, no. 6, pp. 321 - 326, Taylor & Francis Ltd., Jun 2018.

The definitive version is available at https://doi.org/10.1080/21663831.2018.1449767

Department(s)

Materials Science and Engineering

Sponsor(s)

University of Missouri Research Board

International Standard Serial Number (ISSN)

2166-3831

Document Type

Article - Journal

Document Version

Final Version

File Type

text

Language(s)

English

Rights

© 2018 The Authors, All rights reserved.

Creative Commons Licensing

This work is licensed under a Creative Commons Attribution 4.0 License.

Publication Date

01 Jun 2018