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Physical Metallurgy of High-Entropy Alloys

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Abstract

Two definitions of high-entropy alloys (HEAs), based on composition and entropy, are reviewed. Four core effects, i.e., high entropy, sluggish diffusion, severe lattice distortion, and cocktail effects, are mentioned to show the uniqueness of HEAs. The current state of physical metallurgy is discussed. As the compositions of HEAs are entirely different from that of conventional alloys, physical metallurgy principles might need to be modified for HEAs. The thermodynamics, kinetics, structure, and properties of HEAs are briefly discussed relating with the four core effects of HEAs. Among these, a severe lattice distortion effect is particularly emphasized because it exerts direct and indirect influences on many aspects of microstructure and properties. Because a constituent phase in HEAs can be regarded as a whole-solute matrix, every lattice site in the matrix has atomic-scale lattice distortion. In such a distorted lattice, point defects, line defects, and planar defects are different from those in conventional matrices in terms of atomic configuration, defect energy, and dynamic behavior. As a result, mechanical and physical properties are significantly influenced by such a distortion. Suitable mechanisms and theories correlating composition, microstructure, and properties for HEAs are required to be built in the future. Only these understandings make it possible to complete the physical metallurgy of the alloy world.

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References

  1. R.E. Reed-Hill and R. Abbaschian, Physical Metallurgy Principles, 3rd ed. (Boston, MA: PWS Publishing Company, 1994), pp. xiii–xv.

  2. R.W. Cahn and P, Haasen, eds., Physical Metallurgy, 3rd ed. (New York: Elsevier Science Publishers, 1983), pp. 1–35.

  3. J.W. Yeh, S.K. Chen, S.J. Lin, J.Y. Gan, T.S. Chin, T.T. Shun, C.H. Tsau, and S.Y. Chang, Adv. Eng. Mater. 6, 299 (2004).

    Article  Google Scholar 

  4. J.W. Yeh, JOM 65, 1759 (2013).

    Article  Google Scholar 

  5. J.W. Yeh, Ann. Chim. Sci. Mater. 31, 633 (2006).

    Article  Google Scholar 

  6. Y. Zhang, T.T. Zuo, Z. Tang, M.C. Gao, K.A. Dahmen, P.K. Liaw, and Z.P. Lu, Prog. Mater Sci. 61, 1 (2014).

    Article  Google Scholar 

  7. L.J. Santodonato, Y. Zhang, M. Feygenson, C.M. Parish, M.C. Gao, R.J.K. Weber, J.C. Neuefeind, Z. Tang, and P.K. Liaw, Nat. Commun. 6, 5964 (2015).

    Article  Google Scholar 

  8. Y. Zhang, Y.J. Zhou, J.P. Lin, G.L. Chen, and P.K. Liaw, Adv. Eng. Mater. 10, 534 (2008).

    Article  Google Scholar 

  9. Y. Zhang, Z.P. Lu, S.G. Ma, P.K. Liaw, Z. Tang, Y.Q. Cheng, and M.C. Gao, MRS Commun. 4, 57 (2014).

    Article  Google Scholar 

  10. S. Guo, Q. Hu, C. Ng, and C.T. Liu, Intermetallics 41, 96 (2013).

    Article  Google Scholar 

  11. S. Guo, J. Mater. Sci. Tech. 31, 1223 (2015).

    Article  Google Scholar 

  12. K.Y. Tsai, M.H. Tsai, and J.W. Yeh, Acta Mater. 61, 4887 (2013).

    Article  Google Scholar 

  13. C. Lee (Master’s thesis, National Tsing Hua University, 2013).

  14. P.P. Bhattacharjee, G.D. Sathiaraj, M. Zaid, J.R. Gatti, C. Lee, C.W. Tsai, and J.W. Yeh, J. Alloy. Compd. 587, 544 (2014).

    Article  Google Scholar 

  15. A.J. Zaddach, C. Niu, C.C. Kock, and D.L. Irving, JOM 65, 1780 (2013).

    Article  Google Scholar 

  16. B. Gludovatz, A. Hohenwarter, D. Catoor, E.H. Chang, E.P. George, and R.O. Ritchie, Science 345, 1153 (2014).

    Article  Google Scholar 

  17. M.C. Gao, J.W. Yeh, P.K. Liaw, and Y. Zhang, High-Entropy Alloys: Fundamentals and Applications (Cham: Springer, 2015).

    Google Scholar 

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Authors and Affiliations

  1. Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu, 30013, Taiwan, ROC

    Jien-Wei Yeh

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  1. Jien-Wei Yeh
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Yeh, JW. Physical Metallurgy of High-Entropy Alloys. JOM 67, 2254–2261 (2015). https://doi.org/10.1007/s11837-015-1583-5

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  • DOI: https://doi.org/10.1007/s11837-015-1583-5

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