Effect of Annealing on Microstructure and Mechanical Properties of Al<sub>0.5</sub>CoCrFeMo<sub>x</sub>Ni High-Entropy Alloys
The effect of annealing temperature on the microstructure, phase constituents and mechanical properties of Al<sub>0.5</sub>CoCrFeMo<sub>x</sub>Ni high-entropy complex alloys has been investigated at a fixed annealing time (10 h). The 600 °C-annealing has no obvious e...
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| Format: | Article |
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MDPI AG
2018-10-01
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| Series: | Entropy |
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| Online Access: | https://www.mdpi.com/1099-4300/20/11/812 |
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| author | Yan-Xin Zhuang Xiu-Lan Zhang Xian-Yu Gu |
| author_facet | Yan-Xin Zhuang Xiu-Lan Zhang Xian-Yu Gu |
| author_sort | Yan-Xin Zhuang |
| collection | DOAJ |
| description | The effect of annealing temperature on the microstructure, phase constituents and mechanical properties of Al<sub>0.5</sub>CoCrFeMo<sub>x</sub>Ni high-entropy complex alloys has been investigated at a fixed annealing time (10 h). The 600 °C-annealing has no obvious effect on their microstructures, while the annealing at 800⁻1200 °C enhances the precipitation of (Al,Ni)-rich ordered BCC phase or/and (Cr,Mo)-rich σ phase, and thereby greatly affects the microstructure and mechanical properties of the alloys. All the annealed Al<sub>0.5</sub>CoCrFeNi alloys are composed of FCC and (Al,Ni)-rich ordered BCC phases; the phase constituent of the Al<sub>0.5</sub>CoCrFeMo<sub>0.1</sub>Ni alloy changes from FCC + BCC (600 °C) to FCC + BCC + σ (800 °C) and then to FCC + BCC (1100 °C); the phase constituents of the Al<sub>0.5</sub>CoCrFeMo<sub>0.2</sub>Ni and Al<sub>0.5</sub>CoCrFeMo<sub>0.3</sub>Ni alloys change from FCC + BCC + σ to FCC + BCC with the annealing temperature rising from 600 to 1200 °C; while all the annealed Al<sub>0.5</sub>CoCrFeMo<sub>0.4</sub>Ni and Al<sub>0.5</sub>CoCrFeMo<sub>0.5</sub>Ni alloys consist of FCC, BCC and σ phases. The phase constituents of most of the alloys investigated are in good agreement with the calculated results from Thermo-Calc program. The alloys annealed at 800 °C under current investigation conditionshave relative fine precipitations and microstructure, and thereby higher hardness and yield stress. |
| first_indexed | 2024-04-11T21:56:52Z |
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| language | English |
| last_indexed | 2024-04-11T21:56:52Z |
| publishDate | 2018-10-01 |
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| series | Entropy |
| spelling | doaj.art-806725369213452cbc9aebd9fcf451872022-12-22T04:01:05ZengMDPI AGEntropy1099-43002018-10-01201181210.3390/e20110812e20110812Effect of Annealing on Microstructure and Mechanical Properties of Al<sub>0.5</sub>CoCrFeMo<sub>x</sub>Ni High-Entropy AlloysYan-Xin Zhuang0Xiu-Lan Zhang1Xian-Yu Gu2Key Laboratory of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang 110819, ChinaKey Laboratory of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang 110819, ChinaKey Laboratory of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang 110819, ChinaThe effect of annealing temperature on the microstructure, phase constituents and mechanical properties of Al<sub>0.5</sub>CoCrFeMo<sub>x</sub>Ni high-entropy complex alloys has been investigated at a fixed annealing time (10 h). The 600 °C-annealing has no obvious effect on their microstructures, while the annealing at 800⁻1200 °C enhances the precipitation of (Al,Ni)-rich ordered BCC phase or/and (Cr,Mo)-rich σ phase, and thereby greatly affects the microstructure and mechanical properties of the alloys. All the annealed Al<sub>0.5</sub>CoCrFeNi alloys are composed of FCC and (Al,Ni)-rich ordered BCC phases; the phase constituent of the Al<sub>0.5</sub>CoCrFeMo<sub>0.1</sub>Ni alloy changes from FCC + BCC (600 °C) to FCC + BCC + σ (800 °C) and then to FCC + BCC (1100 °C); the phase constituents of the Al<sub>0.5</sub>CoCrFeMo<sub>0.2</sub>Ni and Al<sub>0.5</sub>CoCrFeMo<sub>0.3</sub>Ni alloys change from FCC + BCC + σ to FCC + BCC with the annealing temperature rising from 600 to 1200 °C; while all the annealed Al<sub>0.5</sub>CoCrFeMo<sub>0.4</sub>Ni and Al<sub>0.5</sub>CoCrFeMo<sub>0.5</sub>Ni alloys consist of FCC, BCC and σ phases. The phase constituents of most of the alloys investigated are in good agreement with the calculated results from Thermo-Calc program. The alloys annealed at 800 °C under current investigation conditionshave relative fine precipitations and microstructure, and thereby higher hardness and yield stress.https://www.mdpi.com/1099-4300/20/11/812high-entropy alloysannealingmicrostructuremechanical propertiesphase constituent |
| spellingShingle | Yan-Xin Zhuang Xiu-Lan Zhang Xian-Yu Gu Effect of Annealing on Microstructure and Mechanical Properties of Al<sub>0.5</sub>CoCrFeMo<sub>x</sub>Ni High-Entropy Alloys Entropy high-entropy alloys annealing microstructure mechanical properties phase constituent |
| title | Effect of Annealing on Microstructure and Mechanical Properties of Al<sub>0.5</sub>CoCrFeMo<sub>x</sub>Ni High-Entropy Alloys |
| title_full | Effect of Annealing on Microstructure and Mechanical Properties of Al<sub>0.5</sub>CoCrFeMo<sub>x</sub>Ni High-Entropy Alloys |
| title_fullStr | Effect of Annealing on Microstructure and Mechanical Properties of Al<sub>0.5</sub>CoCrFeMo<sub>x</sub>Ni High-Entropy Alloys |
| title_full_unstemmed | Effect of Annealing on Microstructure and Mechanical Properties of Al<sub>0.5</sub>CoCrFeMo<sub>x</sub>Ni High-Entropy Alloys |
| title_short | Effect of Annealing on Microstructure and Mechanical Properties of Al<sub>0.5</sub>CoCrFeMo<sub>x</sub>Ni High-Entropy Alloys |
| title_sort | effect of annealing on microstructure and mechanical properties of al sub 0 5 sub cocrfemo sub x sub ni high entropy alloys |
| topic | high-entropy alloys annealing microstructure mechanical properties phase constituent |
| url | https://www.mdpi.com/1099-4300/20/11/812 |
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