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Design and Characterization of High Entropy Alloy W₂₄Ta₂₄Nb₂₄Cr₁₆Al₁₂
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Design and Characterization of High Entropy Alloy W₂₄Ta₂₄Nb₂₄Cr₁₆Al₁₂

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Abstract:

A non-Equi atomic W₂₄Ta₂₄Nb₂₄Cr₁₆Al₁₂ high entropy alloy (HEA) was designed based on thermodynamic calculations in order to obtain a single body-centered cubic (BCC) structure. The HEA was further fabricated by using the vacuum arc melting technique. The structural analysis of the HEA revealed the formation of a single BCC phase with the lattice parameter of 3.259Å. The micrograph of the HEA revealed dendritic structure with inter-dendritic segregations. The thermal analysis confirmed that the HEA is quite stable at high temperatures up to 1600°C. The thermal expansion of the HEA was also very low at 1100°C. The mechanical property such as the hardness of the HEA at room temperature, was quite high at 467 ± 20 HV₀.₅. The HEA was further heat treated at a very high temperature (1000°C) and the structural and mechanical properties were evaluated. The heat-treated HEA shows excellent structural stability as no secondary phases were formed in those samples. The mechanical property such as hardness of the HEA was increased continuously on increasing the heat treatment duration, which shows that the current alloy is highly preferable for possible high-temperature applications.

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Periodical:

Materials Science Forum (Volume 1194)

Pages:

19-29

DOI:

https://doi.org/10.4028/p-fzn72A

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Online since:

June 2026

Authors:

N. Hymavathi*, Nitesh Kumar Jha, Sujit Das, Sheela Singh

Keywords:

Differential Scanning Calorimetry, Hardness, High Entropy Alloy, Scanning Electron Microscopy (SEM), Thermo Galvanometric Analysis

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© 2026 Trans Tech Publications Ltd. All Rights Reserved

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