Hexagonal Closed-Packed Precipitation Enhancement in a NbTiHfZr Refractory High-Entropy Alloy
A NbTiHfZr high-entropy alloy (HEA) with a main phase of body-centered cubic structure is fabricated. Some hexagonal closed-packed (hcp) precipitates are observed in this alloy. A thermal-mechanical process, i.e., cold-rolling followed by annealing, can manipulate the volume fraction of the hcp nano...
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| Format: | Article |
| Language: | English |
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MDPI AG
2019-04-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/9/5/485 |
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| author | Yueli Ma Shiwei Wu Yuefei Jia Pengfei Hu Yeqiang Bu Xiangru Chen Gang Wang Jiabin Liu Hongtao Wang Qijie Zhai |
| author_facet | Yueli Ma Shiwei Wu Yuefei Jia Pengfei Hu Yeqiang Bu Xiangru Chen Gang Wang Jiabin Liu Hongtao Wang Qijie Zhai |
| author_sort | Yueli Ma |
| collection | DOAJ |
| description | A NbTiHfZr high-entropy alloy (HEA) with a main phase of body-centered cubic structure is fabricated. Some hexagonal closed-packed (hcp) precipitates are observed in this alloy. A thermal-mechanical process, i.e., cold-rolling followed by annealing, can manipulate the volume fraction of the hcp nano-precipitates that can enhance strength and ductility. The enhancement is tailorable as a function of the volume fraction of the hcp nano-precipitate. The results indicate that the strength-ductility property can be manipulated via adjusting post-deformation heat-treatment methods, which provide a new strategy by utilizing metastability at high-temperature to design high strength refractory HEAs (RHEAs) without lost in ductility. |
| first_indexed | 2024-12-20T08:32:58Z |
| format | Article |
| id | doaj.art-1691e4a5c0ed47f5b83014f8e3ca9aee |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-12-20T08:32:58Z |
| publishDate | 2019-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-1691e4a5c0ed47f5b83014f8e3ca9aee2022-12-21T19:46:39ZengMDPI AGMetals2075-47012019-04-019548510.3390/met9050485met9050485Hexagonal Closed-Packed Precipitation Enhancement in a NbTiHfZr Refractory High-Entropy AlloyYueli Ma0Shiwei Wu1Yuefei Jia2Pengfei Hu3Yeqiang Bu4Xiangru Chen5Gang Wang6Jiabin Liu7Hongtao Wang8Qijie Zhai9Laboratory for Microstructures, Institute of Materials, Shanghai University, Shanghai 200444, ChinaLaboratory for Microstructures, Institute of Materials, Shanghai University, Shanghai 200444, ChinaLaboratory for Microstructures, Institute of Materials, Shanghai University, Shanghai 200444, ChinaLaboratory for Microstructures, Institute of Materials, Shanghai University, Shanghai 200444, ChinaSchool of Materials Science and Engineer, Zhejiang University, Hangzhou 310027, ChinaCenter for Advanced Solidification Technology (CAST), School of Materials Science and Engineering, Shanghai University, Shanghai 200444, ChinaLaboratory for Microstructures, Institute of Materials, Shanghai University, Shanghai 200444, ChinaSchool of Materials Science and Engineer, Zhejiang University, Hangzhou 310027, ChinaSchool of Materials Science and Engineer, Zhejiang University, Hangzhou 310027, ChinaCenter for Advanced Solidification Technology (CAST), School of Materials Science and Engineering, Shanghai University, Shanghai 200444, ChinaA NbTiHfZr high-entropy alloy (HEA) with a main phase of body-centered cubic structure is fabricated. Some hexagonal closed-packed (hcp) precipitates are observed in this alloy. A thermal-mechanical process, i.e., cold-rolling followed by annealing, can manipulate the volume fraction of the hcp nano-precipitates that can enhance strength and ductility. The enhancement is tailorable as a function of the volume fraction of the hcp nano-precipitate. The results indicate that the strength-ductility property can be manipulated via adjusting post-deformation heat-treatment methods, which provide a new strategy by utilizing metastability at high-temperature to design high strength refractory HEAs (RHEAs) without lost in ductility.https://www.mdpi.com/2075-4701/9/5/485high-entropy alloycold-rollingannealingductilitynano-precipitation particle |
| spellingShingle | Yueli Ma Shiwei Wu Yuefei Jia Pengfei Hu Yeqiang Bu Xiangru Chen Gang Wang Jiabin Liu Hongtao Wang Qijie Zhai Hexagonal Closed-Packed Precipitation Enhancement in a NbTiHfZr Refractory High-Entropy Alloy Metals high-entropy alloy cold-rolling annealing ductility nano-precipitation particle |
| title | Hexagonal Closed-Packed Precipitation Enhancement in a NbTiHfZr Refractory High-Entropy Alloy |
| title_full | Hexagonal Closed-Packed Precipitation Enhancement in a NbTiHfZr Refractory High-Entropy Alloy |
| title_fullStr | Hexagonal Closed-Packed Precipitation Enhancement in a NbTiHfZr Refractory High-Entropy Alloy |
| title_full_unstemmed | Hexagonal Closed-Packed Precipitation Enhancement in a NbTiHfZr Refractory High-Entropy Alloy |
| title_short | Hexagonal Closed-Packed Precipitation Enhancement in a NbTiHfZr Refractory High-Entropy Alloy |
| title_sort | hexagonal closed packed precipitation enhancement in a nbtihfzr refractory high entropy alloy |
| topic | high-entropy alloy cold-rolling annealing ductility nano-precipitation particle |
| url | https://www.mdpi.com/2075-4701/9/5/485 |
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