Aufsatz
Quenching of High Entropy Alloys after Annealing
Zusammenfassung
The effect of cooling rate after annealing at 900 °C on the microstructure and hardness of high entropy alloys was investigated using two typical samples with the chemical composition of Co₁₆Cr₁₄.₅Fe₂₉Mn₁₁.₅Ni₂₉ and Co₁₁.₅Cr₇Fe₂₇Mn₂₇Ni₂₇(Nb₀.₀₈C₀.₅) (at%). The microstructural characterisation and hardness measurements were carried out by optical microscopy, scanning electron microscopy, wavelength-dispersive X-ray spectroscopy, electron back scattered diffraction, X-ray diffraction technique and Vickers hardness testing. A face centred cubic crystal structure matrix was observed in both alloys before and after annealing and regardless of cooling conditions. SEM analyses revealed an extensive precipitation in Co₁₁.₅Cr₇Fe₂₇Mn₂₇Ni₂₇ (Nb₀.₀₈C₀.₅) alloy after annealing. It was also found that air/furnace cooling can enhance grain growth-coarsening just in Co₁₆Cr₁₄.₅Fe₂₉Mn₁₁.₅Ni₂₉. However, the hardness results generally showed insignificant hardness variations in both alloys after water-quenching, air-cooling and furnace-cooling. The results suggested that the hardness is mainly controlled by solid solution strengthening.
Zitierform
In: Iranian Journal of Materials Science and Engineering Volume 17 / Issue 4 (2020) eissn:2383-3882Zitieren
@article{doi:10.17170/kobra-202304217870,
author={Abbasi, Erfan and Dehghani, Kamran and Sajadifar, Seyed Vahid and Niendorf, Thomas},
title={Quenching of High Entropy Alloys after Annealing},
journal={Iranian Journal of Materials Science and Engineering},
year={2020}
}
0500 Oax 0501 Text $btxt$2rdacontent 0502 Computermedien $bc$2rdacarrier 1100 2020$n2020 1500 1/eng 2050 ##0##http://hdl.handle.net/123456789/14615 3000 Abbasi, Erfan 3010 Dehghani, Kamran 3010 Sajadifar, Seyed Vahid 3010 Niendorf, Thomas 4000 Quenching of High Entropy Alloys after Annealing / Abbasi, Erfan 4030 4060 Online-Ressource 4085 ##0##=u http://nbn-resolving.de/http://hdl.handle.net/123456789/14615=x R 4204 \$dAufsatz 4170 5550 {{Mikrostruktur}} 5550 {{Legierung}} 7136 ##0##http://hdl.handle.net/123456789/14615
2023-04-21T07:41:25Z 2023-04-21T07:41:25Z 2020 doi:10.17170/kobra-202304217870 http://hdl.handle.net/123456789/14615 eng Namensnennung-Nicht-kommerziell 4.0 International http://creativecommons.org/licenses/by-nc/4.0/ High entropy alloys Cooling rate Annealing Microstructure Hardness 600 Quenching of High Entropy Alloys after Annealing Aufsatz The effect of cooling rate after annealing at 900 °C on the microstructure and hardness of high entropy alloys was investigated using two typical samples with the chemical composition of Co₁₆Cr₁₄.₅Fe₂₉Mn₁₁.₅Ni₂₉ and Co₁₁.₅Cr₇Fe₂₇Mn₂₇Ni₂₇(Nb₀.₀₈C₀.₅) (at%). The microstructural characterisation and hardness measurements were carried out by optical microscopy, scanning electron microscopy, wavelength-dispersive X-ray spectroscopy, electron back scattered diffraction, X-ray diffraction technique and Vickers hardness testing. A face centred cubic crystal structure matrix was observed in both alloys before and after annealing and regardless of cooling conditions. SEM analyses revealed an extensive precipitation in Co₁₁.₅Cr₇Fe₂₇Mn₂₇Ni₂₇ (Nb₀.₀₈C₀.₅) alloy after annealing. It was also found that air/furnace cooling can enhance grain growth-coarsening just in Co₁₆Cr₁₄.₅Fe₂₉Mn₁₁.₅Ni₂₉. However, the hardness results generally showed insignificant hardness variations in both alloys after water-quenching, air-cooling and furnace-cooling. The results suggested that the hardness is mainly controlled by solid solution strengthening. open access Abbasi, Erfan Dehghani, Kamran Sajadifar, Seyed Vahid Niendorf, Thomas 130-141 doi:10.22068/ijmse.17.4.130 Mikrostruktur Legierung publishedVersion eissn:2383-3882 Issue 4 Iranian Journal of Materials Science and Engineering Volume 17 false
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