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Effect of processing route on phase stability in equiatomic multicomponent Ti20Fe20Ni20Co20Cu20 high entropy alloy

Mohanty, S and Samal, S and Tazuddin, A and Tiwary, CS and Gurao, NP and Biswas, K (2015) Effect of processing route on phase stability in equiatomic multicomponent Ti20Fe20Ni20Co20Cu20 high entropy alloy. In: MATERIALS SCIENCE AND TECHNOLOGY, 31 (10). pp. 1214-1222.

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Official URL: http://dx.doi.org/10.1179/1743284715Y.0000000024

Abstract

The evolution of microstructure and phase formation in equiatomic Ti20Fe20Ni20Co20Cu20 high entropy alloy synthesised by conventional arc melting followed with suction casting and ball milling with spark plasma sintering route is distinctly different. The cast microstructure exhibits one body centre cubic and two face centre cubic high entropy phases based on titanium, cobalt and copper respectively along with a eutectic containing Ti2Ni type Laves phase. On the contrary, spinodal decomposed microstructure consisting of cobalt and copper solid solution is obtained in the sintered sample. However, long term annealing of cast sample at 950 degrees C reveals a eutectoid transformation with different phases than the cast sample. The aforementioned observations are discussed using CALPHAD thermodynamical approach and available literature.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the MANEY PUBLISHING, STE 1C, JOSEPHS WELL, HANOVER WALK, LEEDS LS3 1AB, W YORKS, ENGLAND
Keywords: HEA; Suction casting; Ball milling; Stability; Phase separation
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Depositing User: Id for Latest eprints
Date Deposited: 31 Jul 2015 04:54
Last Modified: 31 Jul 2015 04:54
URI: http://eprints.iisc.ac.in/id/eprint/51912

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