Research article
Solid-solution phase formation rules for high entropy alloys: A thermodynamic perspective
- 1 Department of New Science and Technology, Nanomaterials Group, Semnan University, Semnan, Iran
- 2 Department of Materials and Metallurgical Engineering, Semnan University, Semnan, Iran
Abstract
To save time and money before starting the production of a high entropy alloy (HEA), it is important to predict the possibility of HEA formation and the probable final microstructure using the solid solution phase formation thermodynamic rules. In this research, a step-by-step calculation of thermodynamic parameters is conducted to predict the possibility of formation and determine the final properties such as ∆Hmix, ∆Smix, δr, δχ, Ω, VEC, and Tm for three Ni20Co20Cu15Fe20Mn25, Ni35Co20Cu5Fe5Mn35, and Ni5Co5Cu35Fe35Mn20 HEAs. Based on the obtained results, it is not possible to form a HEA with a solid solution structure for the Ni35Co20Cu5Fe5Mn35 and Ni5Co5Cu35Fe35Mn20 systems due to a low ∆Smix value of 11.28 J.mol-1.K-1. Based on the calculated values of ∆Hmix, intermetallic compound formation and segregation are predicted for Ni35Co20Cu5Fe5Mn35 and Ni5Co5Cu35Fe35Mn20, respectively.
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Keywords:
High entropy alloy, Thermodynamic parameters, Solid solution, Phase formation, Segregation, Intermetallic compound
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Cited By
Submitted
2023-11-29
Published
2024-03-29
How to Cite
Mamnooni, S., Borhani, E., & Heydari, H. (2024). Solid-solution phase formation rules for high entropy alloys: A thermodynamic perspective. Synthesis and Sintering, 4(1), 65-78. https://doi.org/10.53063/synsint.2024.41192
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Copyright (c) 2024 Samaneh Mamnooni, Ehsan Borhani, Hassan Heydari
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