Microstructure and Mechanical Properties of Sintered and Heat-Treated HfNbTaTiZr High Entropy Alloy
Abstract
:1. Introduction
2. Materials and Methods
3. Results
3.1. Microstructure
3.2. Mechanical Properties
4. Discussion
5. Conclusions
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
References
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Phase | Ti | Zr | Nb | Hf | Ta |
---|---|---|---|---|---|
Matrix bcc | 19.9 ± 0.5 | 19.0 ± 1.3 | 21.1 ± 1.6 | 20.2 ± 0.9 | 19.8 ± 1.7 |
precipitate bcc2 | 22.0 ± 2.1 | 7.0 ± 1.4 | 28.3 ± 2.8 | 11.1 ± 1.2 | 31.3 ± 3.4 |
precipitate hcp | 7.7 ± 1.5 | 40.7 ± 1.6 | 6.5 ± 2.5 | 38.8 ± 3.0 | 7.8 ± 3.0 |
Specimen | bcc | hcp (Zr- and Hf-rich) | bcc2 (Ta- and Nb-rich) |
---|---|---|---|
“2 h” | 68.5% | 5% | 26.5% |
“4 h” | 59.5% | 11.3% | 29.2% |
“8 h” | 65.6% | 11.6% | 22.8% |
“16 h” | 65.0% | 6.8% | 28.2% |
“32 h” | 58.5% | 13% | 28.5% |
“64 h” * | 52.2% | 5.3% | 41.3% |
“2 h” + 1200 °C/1 h/WQ | 87.5% | 12.5% | - |
“4 h” + 1200 °C/1 h/WQ | 91.8% | 8.2% | - |
“8 h” + 1200 °C/1 h/WQ | 95.3% | 4.7% | - |
“16 h” + 1200 °C/1 h/WQ | 94.4% | 5.6% | - |
“32 h” + 1200 °C/1 h/WQ | 94.6% | 5.4% | - |
“64 h” + 1200 °C/1 h/WQ | 92.1% | 7.9% | - |
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Málek, J.; Zýka, J.; Lukáč, F.; Čížek, J.; Kunčická, L.; Kocich, R. Microstructure and Mechanical Properties of Sintered and Heat-Treated HfNbTaTiZr High Entropy Alloy. Metals 2019, 9, 1324. https://doi.org/10.3390/met9121324
Málek J, Zýka J, Lukáč F, Čížek J, Kunčická L, Kocich R. Microstructure and Mechanical Properties of Sintered and Heat-Treated HfNbTaTiZr High Entropy Alloy. Metals. 2019; 9(12):1324. https://doi.org/10.3390/met9121324
Chicago/Turabian StyleMálek, Jaroslav, Jiří Zýka, František Lukáč, Jakub Čížek, Lenka Kunčická, and Radim Kocich. 2019. "Microstructure and Mechanical Properties of Sintered and Heat-Treated HfNbTaTiZr High Entropy Alloy" Metals 9, no. 12: 1324. https://doi.org/10.3390/met9121324