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Combinatorial thin film screening to identify single-phase, non-equiatomic high entropy alloys in the MnFeCoNiCu system

  • Azin Akbari (a1) and Thomas J. Balk (a1)

Abstract

To identify new face centered cubic high entropy alloys (HEAs), MnFeCoNiCu thin film samples were prepared by simultaneous magnetron sputtering of elements onto Si wafers. This sputtering arrangement yielded compositional gradients in the samples. The films exhibited regions with different phases, some of which were single-phase and non-equiatomic. To screen the crystal structure and composition across film samples, multiple characterization techniques were used: scanning electron microscopy, focused ion beam, energy-dispersive x-ray spectroscopy, x-ray diffraction, and electron backscattered diffraction analysis. Using this combinatorial method, candidate single-phase HEAs were identified and then successfully arc-melted in bulk form, followed by thermomechanical processing.

Copyright

Corresponding author

Address all correspondence to Thomas J. Balk at john.balk@uky.edu

References

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1.Yeh, B.J., Chen, S., Lin, S., Gan, J., Chin, T., Shun, T., and Tsau, C.: Nanostructured high-entropy alloys with multiple principal elements: novel alloy design concepts and outcomes. Adv. Eng. Mater. 6, 299303 (2004).
2.Cantor, B., Chang, I.T.H., Knight, P., and Vincent, A.J.B.: Microstructural development in equiatomic multicomponent alloys. Mater. Sci. Eng. A. 375, 213218 (2004).
3.Zou, Y., Wheeler, J.M., Ma, H., Okle, P., and Spolenak, R.: Nanocrystalline high-entropy alloys: a new paradigm in high- temperature strength and stability. Nano Lett. 17, 15691574 (2017).
4.Wu, Z., Bei, H., Pharr, G.M., and George, E.P.: Temperature dependence of the mechanical properties of equiatomic solid solution alloys with face-centered cubic crystal structures. Acta. Mater. 81, 428441 (2014).
5.Chang, Y.-J. and Yeh, A.-C.: The evolution of microstructures and high temperature properties of AlxCo1.5CrFeNi1.5Tiy high entropy alloys. J. Alloys Compd. 653, 379385 (2015).
6.Fu, X., Schuh, C.A., and Olivetti, E.A.: Materials selection considerations for high entropy alloys. Scr. Mater. 138, 145150 (2017).
7.Zhang, Y., Zuo, T.T., Tang, Z., Gao, M.C., Dahmen, K.A., Liaw, P.K., and Lu, Z.P.: Microstructures and properties of high-entropy alloys. Prog. Mater. Sci. 61, 193 (2014).
8.Miracle, D.B. and Senkov, O.N.: A critical review of high entropy alloys and related concepts. Acta Mater. 122, 448511 (2017).
9.Ye, Y.F., Wang, Q., Lu, J., Liu, C.T., and Yang, Y.: High-entropy alloy: challenges and prospects. Mater. Today 19, 349362 (2015).
10.He, J.Y., Liu, W.H., Wang, H., Wu, Y., Liu, X.J., Nieh, T.G., and Lu, Z.P.: Effects of Al addition on structural evolution and tensile properties of the FeCoNiCrMn high-entropy alloy system. Acta Mater. 62, 105113 (2014).
11.Sriharitha, R., Murty, B.S., and Kottada, R.S.: Alloying, thermal stability and strengthening in spark plasma sintered AlxCoCrCuFeNi high entropy alloys. J. Alloys Compd. 583, 419426 (2014).
12.Tang, Z., Gao, M.C., Diao, H., Yang, T., Liu, J., Zuo, T., Zhang, Y., Lu, Z., Cheng, Y., Zhang, Y., Dahmen, K.A., Liaw, P.K., and Egami, T.: Aluminum alloying effects on lattice types, microstructures, and mechanical behavior of high-entropy alloys systems. JOM 65, 18481858 (2013).
13.Kao, Y.-F., Chen, T.-J., Chen, S.-K., and Yeh, J.-W.: Microstructure and mechanical property of as-cast, -homogenized, and -deformed AlxCoCrFeNi (0 ≤ x ≤ 2) high-entropy alloys. J. Alloys Compd. 488, 199229 (2009).
14.Li, C., Xue, Y., Hua, M., Cao, T., Ma, L., and Wang, L.: Microstructure and mechanical properties of AlxSi0.2CrFeCoNiCu1 − x high-entropy alloys. Mater. Des. 90, 601609 (2016).
15.Zhang, Y., Yang, X., and Liaw, P.K.: Alloy design and properties optimization of high-entropy alloys. JOM 64, 830838 (2012).
16.Youssef, K.M., Zaddach, A.J., Niu, C., Irving, D.L., and Koch, C.C.: A novel low-density, high-hardness, high- entropy alloy with close-packed single-phase nanocrystalline structures. Mater. Res. Lett. 3, 9599 (2015).
17.Guo, S. and Liu, C.T.: Phase stability in high entropy alloys: formation of solid-solution phase or amorphous phase. Prog. Nat. Sci. Mater. Int. 21, 433446 (2011).
18.Sun, W., Huang, X., and Luo, A.A.: CALPHAD: computer coupling of phase diagrams and thermochemistry phase formations in low density high entropy alloys. Calphad 56, 1928 (2017).
19.Yong, Z. and Yun, J.Z.: Solid solution formation criteria for high entropy alloys. Mater. Sci. Forum. 561–565, 13371339 (2007).
20.Gao, M.C., Zhang, B., Guo, S.M., Qiao, J.W., and Hawk, J.A.: High-entropy alloys in hexagonal close-packed structure. Metall. Mater. Trans. A. 47, 33223332 (2015).
21.Troparevsky, M.C., Morris, J.R., Kent, P.R.C., Lupini, A.R., and Stocks, G.M.: Criteria for predicting the formation of single-phase high-entropy alloys. Phys. Rev. X. 5, 011041 (2015).
22.Ohring, M.: Materials Science of Thin Films, 2nd ed. (Academic Press, San Diego, USA, 2002), pp. 495558.
23.Jablonski, P.D., Licavoli, J.J., Gao, M.C., and Hawk, J.A.: Manufacturing of high entropy alloys. JOM 67, 22782287 (2015).
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MRS Communications
  • ISSN: 2159-6859
  • EISSN: 2159-6867
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