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

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posted on 2019-12-01, 00:00 authored by R John, A Karati, M M Garlapati, M Vaidya, R Bhattacharya, Daniel FabijanicDaniel Fabijanic, B S Murty
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.

History

Journal

Journal of materials science

Volume

54

Issue

23

Pagination

14588 - 14598

Publisher

Springer

Location

New York, N.Y.

ISSN

0022-2461

eISSN

1573-4803

Language

eng

Publication classification

C1 Refereed article in a scholarly journal

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