Transactions of the Indian Institute of Metals

, Volume 71, Issue 11, pp 2795–2799 | Cite as

Phase Evolution and Mechanical Behaviour of Co–Fe–Mn–Ni–Ti Eutectic High Entropy Alloys

  • Reliance JainEmail author
  • M. R. Rahul
  • Sandeep Jain
  • Sumanta SamalEmail author
  • Vinod Kumar
Technical Paper


The current study is aimed to understand the microstructure evolution in Co20Fe20Mn20Ni20Ti20 and Co25Fe25Mn5Ni25Ti20 high entropy alloys (HEAs). The complete X-ray diffraction and scanning electron microscopy coupled with energy dispersive spectroscopy analyses are carried out to recognize the phases in addition to understand the series of phase development in the presently studied HEAs. For Co–Fe–Mn–Ni–Ti HEAs, at first BCC (β) phase primary dendritic phase is created from the liquid, followed by peritectic reaction to form FCC (α) phase (i.e. BCC (β) + L → FCC (α)). Then the left over liquid undergoes eutectic reaction to form FCC (α) and Ti2(Ni, Co) phases (i.e. L → FCC (α) + Ti2(Ni, Co)). Furthermore, the pseudo quasi-peritectic reactions i.e. L + BCC (β) → FCC (α) +Ti2(Ni, Co) has been proposed based on the microstructure evolution study in case of Co–Fe–Mn–Ni–Ti HEAs. It is important to note that Co–Fe–Mn–Ni–Ti HEAs show eutectics between FCC (α) and Ti2(Ni, Co) phases. The multicomponent Co25Fe25Mn5Ni25Ti20 eutectic HEA shows the retention of high strength at elevated temperature.


Eutectic high entropy alloy SEM XRD Phase evolution Pseudo-quasiperitectic reaction 


  1. 1.
    Murty B S, and Ranganthan S, High Entropy Alloys, Elsevier, Amsterdam (2014).CrossRefGoogle Scholar
  2. 2.
    Zhang Y, Zuo T T, Tang Z,Gao M C, Dahmen K A, Liaw P K, and Zhao P L Prog Mater Sci 61 (2014) 1.CrossRefGoogle Scholar
  3. 3.
    Yeh J W, Chen S K, Lin S J, Gan J Y, Chin T S, Shun T T, Tsau C H, and Chang S Y, Adv Eng Mater 6 (2004) 299.CrossRefGoogle Scholar
  4. 4.
    Zhang K B, Fu Z Y, Zhang J Y, Shi J, Wang W M, and Wang H, J Alloys Compd 502 (2010) 295.CrossRefGoogle Scholar
  5. 5.
    Wang F J, Zhang Y, Chen G L, and Davies HA, J Eng Mater Technol 131 (2009) 034501.CrossRefGoogle Scholar
  6. 6.
    Mohanty S, Samal S, Tazuddin A, Tiwary C S, Gurao N P, and Biswas K, Mater Sci Technol 31 (2015) 1214.CrossRefGoogle Scholar
  7. 7.
    Mridha S, Samal S, Khan P Y, Biswas K, and Govind B, Metall Mater Trans A Phys Metall Mater Sci 44 (2013) 4532.Google Scholar
  8. 8.
    Senkov O N, Wilks G B, Scott J M, and Miracle D B, Intermetallics 19 (2011) 698.CrossRefGoogle Scholar
  9. 9.
    Tsai K Y, Tsai M H and Yeh J W, Acta Mater 61 (2013) 4887.CrossRefGoogle Scholar
  10. 10.
    Beke D L, and Erdélyi G, Mater Lett 164 (2016) 111.CrossRefGoogle Scholar
  11. 11.
    Mishra A K, Samal S, and Biswas K, TransIndian Inst Met 65 (2012) 725.CrossRefGoogle Scholar
  12. 12.
    Guo S, Ng C, and Liu C T, Mater Res Lett 1 (2013) 228.CrossRefGoogle Scholar
  13. 13.
    Samal S, Mohanty S, Misra A K, Biswas K, and Govind B, Mater Sci Forum 790–791 (2014) 503.CrossRefGoogle Scholar
  14. 14.
    Samal S, Rahul M R, Kottada R S, and Phanikumar G, Mater Sci Eng A 664 (2016) 227.CrossRefGoogle Scholar
  15. 15.
    Rahul M R, Samal S, Venugopal S, and Phanikumar G, J Alloys Compd 749 (2018) 1115.CrossRefGoogle Scholar
  16. 16.
    Anton D L, and Shah D M, Mater Sci Eng A 153 (1992) 410.CrossRefGoogle Scholar
  17. 17.
    Machon L, and Sauthoff G, Intermetallics 4 (1996) 469.CrossRefGoogle Scholar
  18. 18.
    Thoma D J, Chu F, Peralta P, Kotula P G, Chen K C, and Mitchell T E, Mater Sci Eng A 239 (1997) 251.CrossRefGoogle Scholar
  19. 19.
    Bhattacharjee T, Zheng R, Chong Y, Sheikh S, Guo S, Clark I T, Okawa T, Wani I S, Bhattacharjee P P, Shibata A, and Tsuji N, Mater Chem Phys 210 (2018) 207.CrossRefGoogle Scholar
  20. 20.
    Feng H, Wang Z, Cheng P, Wang Q, Li J, Dang Y, Wang J, and Liu C T, J Alloys Compd 656 (2016) 284.CrossRefGoogle Scholar
  21. 21.
    Huo W, Zhou H, Fang F, Xie Z, and Jiang J, Mater Des 134 (2017) 226.CrossRefGoogle Scholar
  22. 22.
    Yiping L, Yong D, Sheng G, Jiang L, Kang H, Wang T, Wen B, Wang Z, Jie J, Cao Z, Ruan H, and Li T. Met Alloys Struct Prop Sci Rep 4 (2014) 6200, doi:10.1038.Google Scholar
  23. 23.
    Zhang F, Zhang C, Chen S L, Zhu J, Cao W S, and Kattner U R, CALPHAD 45 (2014) 1.CrossRefGoogle Scholar
  24. 24.
    Zhang C, Zhang F, Chen S L, and Cao W S JOM 64 (2012) 839.CrossRefGoogle Scholar

Copyright information

© The Indian Institute of Metals - IIM 2018

Authors and Affiliations

  1. 1.Discipline of Metallurgy Engineering and Materials ScienceIndian Institute of Technology IndoreSimrol, IndoreIndia
  2. 2.Department of Metallurgical and Materials EngineeringIndian Institute of Technology MadrasChennaiIndia

Personalised recommendations