Journal of Materials Science

, Volume 54, Issue 23, pp 14588–14598 | Cite as

Influence of mechanically activated annealing on phase evolution in Al0.3CoCrFeNi high-entropy alloy

  • Rahul John
  • Anirudha Karati
  • Mohan Muralikrishna Garlapati
  • Mayur Vaidya
  • Rahul Bhattacharya
  • Daniel Fabijanic
  • B. S. MurtyEmail author
Metals & corrosion


In the present work, the concept of mechanically activated annealing (MAA) has been applied to produce nanocrystalline Al0.3CoCrFeNi high-entropy alloys (HEAs) with reduced contamination levels. Phase evolution during conventional mechanical alloying (MA), MAA and subsequent consolidation by spark plasma sintering (SPS) have been studied in detail. Complete alloying is obtained after 15 h of MA, while milling time of 5 h and annealing at 1100 °C for 1 h have been used to achieve alloy formation during MAA. Both the MA–SPS and MAA–SPS routes have shown major FCC phase. The contamination of WC observed during MA was successfully eliminated during MAA, while the volume fraction of Cr7C3 reduced from 20% during MA–SPS to 10% after MAA–SPS. This method can serve as an effective way to produce nanostructured HEAs with minimum contamination.



DF would like to acknowledge the financial support of the Australian government via the Department of Industry, Innovation and Science Australia–India Strategic Research Fund project AISRF53731.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Supplementary material

10853_2019_3917_MOESM1_ESM.docx (3.9 mb)
Supplementary material 1 (DOCX 3954 kb)


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© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Institute for Frontier MaterialsDeakin UniversityGeelongAustralia
  2. 2.Department of Metallurgical and Materials EngineeringIndian Institute of Technology MadrasChennaiIndia
  3. 3.Department of ChemistryIndian Institute of Technology MadrasChennaiIndia

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