Sigma Phase Stabilization by Nb Doping in a New High-Entropy Alloy in the FeCrMnNiCu System: A Study of Phase Prediction and Nanomechanical Response
Abstract
:1. Introduction
2. Methodology
3. Results and Discussion
3.1. Computational Simulation
3.2. Microstructural Characterization
3.3. Micro/Nano-Mechanical Response
3.3.1. Microhardness
3.3.2. Nanohardness
3.4. Development Prospects for the New HEA Dopped with Nb
4. Conclusions
Author Contributions
Funding
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Sample | Fe | Cr | Mn | Cu | Ni | Nb |
---|---|---|---|---|---|---|
HEA1 | 41 | 25 | 18 | 8 | 8 | 0 |
HEA2 | 39 | 25 | 18 | 8 | 8 | 2 |
Sample | ΔHmix | Δχ | VEC | γp | Predicted Phase |
---|---|---|---|---|---|
HEA1 | 0.470 | 0.124 | 7.646 | 1.025 | FCC + BCC |
HEA2 | 0.075 | 0.125 | 7.606 | 1.196 | FCC + BCC + IM|FCC + IM |
Phase | Fe | Cr | Mn | Ni | Cu |
---|---|---|---|---|---|
α | 16.43 | 72.00 | 9.27 | − | 2.29 |
γ | 43.07 | 7.18 | 14.23 | 8.72 | 26.80 |
γ(Cu) | 11.64 | 3.88 | 17.11 | 8.07 | 59.30 |
Phase | Fe | Cr | Mn | Ni | Cu | Nb |
---|---|---|---|---|---|---|
Nb-RP | 49.31 | 8.12 | 6.75 | 5.05 | − | 30.77 |
σ | 40.38 | 42.05 | 14.50 | 2.20 | 0.87 | − |
Phase | 2ϴ (°) HEA1 | 2ϴ (°) HEA2 | Space Group | a (Å) | Calculated a HEA1 (Å) | Calculated a HEA2 (Å) |
---|---|---|---|---|---|---|
Cr (100) | 35.14 | 35.14 | P63/mmc | 2.53 | 2.55 | 2.55 |
Cr (002) | 40.44 | 40.5 | P63/mmc | 2.21 | 2.28 | 2.22 |
Nb (111) | − | 36.9 | Fm-3 m | 2.44 | − | 2.43 |
Nb (011) | − | 38.26 | Im-3 m | 2.33 | − | 2.33 |
Nb (022) | − | 62.18 | Fm-3 m | 1.49 | − | 1.49 |
γCu (111) | 42.72 | 42.76 | Fm-3 m | 2.10 | 2.11 | 2.11 |
γ (111) | 43.44 | 43.44 | Fm-3 m | 2.07 | 2.08 | 2.08 |
γ (020) | 50.60 | 50.52 | Fm-3 m | 1.79 | 1.80 | 1.80 |
γ (022) | 74.46 | 74.38 | Fm-3 m | 1.27 | 1.27 | 1.27 |
α (011) | 44.24 | 44.28 | Im-3 m | 2.02 | 2.04 | 2.04 |
α (020) | 64.48 | 64.52 | Im-3 m | 1.43 | 1.44 | 1.44 |
α (121) | 81.52 | 81.62 | Im-3 m | 1.17 | 1.17 | 1.17 |
σ (212) | − | 45.84 | P42/mnm | 1.97 | − | 1.97 |
σ (411) | − | 46.90 | P42/mnm | 1.93 | − | 1.93 |
σ (331) | − | 48.08 | P42/mnm | 1.88 | − | 1.89 |
σ (222) | − | 49.52 | P42/mnm | 1.83 | − | 1.83 |
χ (233) | − | 49.52 | I-43 m | 1.82 | − | 1.83 |
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Oñate, A.; Sanhueza, J.P.; Dueña, G.; Wackerling, D.; Sauceda, S.; Salvo, C.; Valenzuela, M.; Medina, C.; Seidou, A.H.; Tchuindjang, J.T.; et al. Sigma Phase Stabilization by Nb Doping in a New High-Entropy Alloy in the FeCrMnNiCu System: A Study of Phase Prediction and Nanomechanical Response. Metals 2024, 14, 74. https://doi.org/10.3390/met14010074
Oñate A, Sanhueza JP, Dueña G, Wackerling D, Sauceda S, Salvo C, Valenzuela M, Medina C, Seidou AH, Tchuindjang JT, et al. Sigma Phase Stabilization by Nb Doping in a New High-Entropy Alloy in the FeCrMnNiCu System: A Study of Phase Prediction and Nanomechanical Response. Metals. 2024; 14(1):74. https://doi.org/10.3390/met14010074
Chicago/Turabian StyleOñate, Angelo, Juan Pablo Sanhueza, Gleydis Dueña, Diego Wackerling, Sergio Sauceda, Christopher Salvo, Marian Valenzuela, Carlos Medina, Abdul Herrim Seidou, Jérôme Tchoufang Tchuindjang, and et al. 2024. "Sigma Phase Stabilization by Nb Doping in a New High-Entropy Alloy in the FeCrMnNiCu System: A Study of Phase Prediction and Nanomechanical Response" Metals 14, no. 1: 74. https://doi.org/10.3390/met14010074