An Evaluation of Microstructure and Hardness Properties of Zr Added FeNiAlCoCr High Entropy Alloys

Rafidah Razuan; Mohamad Kamal Harun; Mahesh Talari

doi:10.4028/www.scientific.net/MSF.846.20

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HomeMaterials Science ForumMaterials Science Forum Vol. 846An Evaluation of Microstructure and Hardness...

An Evaluation of Microstructure and Hardness Properties of Zr Added FeNiAlCoCr High Entropy Alloys

Abstract:

High Entropy Alloy (HEA) with at least 5 elements with equimolar ratios were developed to investigate the characteristics of Zr added in FeNiAlCoCrZr_x(x=0.0, 0.2, 0.4, 0.6, 0.8 and 1.0). HEAs were prepared by arc melting technique in Ar atmosphere and were remelted five times to ensure homogeneity. The microstructure and phase constitution of these alloys are examined by X-Ray diffraction (XRD) and Scanning Electron Microscope (SEM). The results show that addition of Zr to FeNiAlCoCr HEA resulted in multiple solid solution phases viz., BCC1, BCC2, FCC1 and FCC2 as evidenced by XRD patterns. Furthermore, presence of both BCC and FCC phases at higher Zr additions suggests that Zr did not preferentially promoted the solidification of either BCC or FCC phase. It can be observed from the FESEM micrographs that with different Zr additions, solidified microstructures of FeNiAlCoCrZr_x alloys varied between completely eutectic microstructures to proeutectic and eutectic phase mixtures. From FESEM micrographs it can be suggested that different Zr contents have resulted in different solidification modes. Hardness of Zr added samples is higher compared to base HEA which is FeNiAlCoCr. It was observed that hardness values are higher when proeutectic phases were present compared to completely eutectic FeNiAlCoCrZr alloy (x=0.1).

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Materials Science Forum (Volume 846)

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20-26

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https://doi.org/10.4028/www.scientific.net/MSF.846.20

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March 2016

Authors:

Rafidah Razuan, Mohamad Kamal Harun, Mahesh Talari*

Keywords:

Hardness, High Entropy Alloys, Microstructure

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References

[1] C. Li, J.C. Li., M. Zhao, Q. Jiang, Effect of alloying elements on microstructure and properties of multiprincipal elements high-entropy alloys, Alloys and Compounds. 475 (2009) 752-757.

DOI: 10.1016/j.jallcom.2008.07.124

Google Scholar

[2] J. W. Yeh, Y. L. Chen, S. J. Lin, S. K. Chen, High-Entropy Alloys – A New Era of Exploitation, Mater Sci Forum Vol. 560 (2007) 1-9.

Google Scholar

[3] U. S. Hsu, U. D. Hung, J. W. Yeh, S. K. Chen, Y. S. Huang, C. C. Yang, Alloying behavior of iron, gold and silver in AlCoCrCuNi-based equimolar high-entropy alloys, Mater Sci Eng A 460–461 (2007) 403-408.

DOI: 10.1016/j.msea.2007.01.122

Google Scholar

[4] Sheng GUO, L. C. T, Phase stability in high entropy alloys: Formation of solid-solution phase or amorphous phase, Progress in Natural Science: Materials International 21 (2011) 433-446.

DOI: 10.1016/s1002-0071(12)60080-x

Google Scholar

[5] S. Varalakshmi, M. Kamaraj, B.S. Murty, Processing and properties of nanocrystalline CuNiCoZnAlTi high entropy alloys by mechanical alloying, Materials Science and Engineering A 527 (2010) 1027–1030.

DOI: 10.1016/j.msea.2009.09.019

Google Scholar

[6] J. W. Yeh, S. K. Chen, J. Y. Gan, S. J. Lin, T. S. Chin, T. T. Shun, C. H. Tsau, S. Y. Chang, Formation of simple crystal structure in Cu-Co-Ni-Cr-Al-Fe-Ti-V alloys with multiprincipal metallic elements, Metall. Mater. Trans. A 35 (2004) 2533.

DOI: 10.1007/s11661-006-0234-4

Google Scholar

[7] C. M Lin, T. H. L, Evolution of microstructure, hardness, and corrosion properties of high-entropy Al0. 5CoCrFeNi alloy, Intermetallics 19 (2011) 288-294.

DOI: 10.1016/j.intermet.2010.10.008

Google Scholar