The Microstructural Evolution and Mechanical Properties of Boron-Doped Ti<sub>35</sub>Zr<sub>30</sub>V<sub>10</sub>Nb<sub>25</sub> Refractory High-Entropy Alloy
The addition of oxygen or nitrogen in refractory high-entropy alloys (HEAs) has been widely reported, but studies on boron-doped HEAs have mainly focused on the segregation of boron elements at grain boundaries. The changes in the microstructure and mechanical properties in TiZrNb-based HEAs remain...
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2024-11-01
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| author | Xinggang Wang Meng Sun Jiaxin Liu Xueqing Liu Weibin Jiang Xianping Wang Qianfeng Fang |
| author_facet | Xinggang Wang Meng Sun Jiaxin Liu Xueqing Liu Weibin Jiang Xianping Wang Qianfeng Fang |
| author_sort | Xinggang Wang |
| collection | DOAJ |
| description | The addition of oxygen or nitrogen in refractory high-entropy alloys (HEAs) has been widely reported, but studies on boron-doped HEAs have mainly focused on the segregation of boron elements at grain boundaries. The changes in the microstructure and mechanical properties in TiZrNb-based HEAs remain enigmatic. In this work, boron-doped Ti<sub>35</sub>Zr<sub>30</sub>V<sub>10</sub>Nb<sub>25</sub> (Ti35-xB) refractory HEAs were designed to elucidate their microstructural evolution and mechanical properties. Unlike oxygen and nitrogen, trace amounts of boron addition result in the formation of borides, and boron exhibits a strong repulsion towards Zr, leading to Zr-depleted borides. Borides distributed along the grain boundaries refine the grain size and dendritic structure. The borides and structural refinement effect enhance the strain-hardening capacity and uniform elongation, resulting in an over 15% uniform elongation for Ti35-0.25B. |
| format | Article |
| id | doaj-art-221465476fbc4c3e958ec5f4327a4b95 |
| institution | DOAJ |
| issn | 2073-4352 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | MDPI AG |
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| series | Crystals |
| spelling | doaj-art-221465476fbc4c3e958ec5f4327a4b952025-08-20T02:53:40ZengMDPI AGCrystals2073-43522024-11-011412102910.3390/cryst14121029The Microstructural Evolution and Mechanical Properties of Boron-Doped Ti<sub>35</sub>Zr<sub>30</sub>V<sub>10</sub>Nb<sub>25</sub> Refractory High-Entropy AlloyXinggang Wang0Meng Sun1Jiaxin Liu2Xueqing Liu3Weibin Jiang4Xianping Wang5Qianfeng Fang6Key Laboratory of Materials Physics, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, ChinaKey Laboratory of Materials Physics, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, ChinaKey Laboratory of Materials Physics, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, ChinaKey Laboratory of Materials Physics, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, ChinaKey Laboratory of Materials Physics, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, ChinaKey Laboratory of Materials Physics, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, ChinaKey Laboratory of Materials Physics, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, ChinaThe addition of oxygen or nitrogen in refractory high-entropy alloys (HEAs) has been widely reported, but studies on boron-doped HEAs have mainly focused on the segregation of boron elements at grain boundaries. The changes in the microstructure and mechanical properties in TiZrNb-based HEAs remain enigmatic. In this work, boron-doped Ti<sub>35</sub>Zr<sub>30</sub>V<sub>10</sub>Nb<sub>25</sub> (Ti35-xB) refractory HEAs were designed to elucidate their microstructural evolution and mechanical properties. Unlike oxygen and nitrogen, trace amounts of boron addition result in the formation of borides, and boron exhibits a strong repulsion towards Zr, leading to Zr-depleted borides. Borides distributed along the grain boundaries refine the grain size and dendritic structure. The borides and structural refinement effect enhance the strain-hardening capacity and uniform elongation, resulting in an over 15% uniform elongation for Ti35-0.25B.https://www.mdpi.com/2073-4352/14/12/1029refractory HEAsboronmicrostructuremechanical properties |
| spellingShingle | Xinggang Wang Meng Sun Jiaxin Liu Xueqing Liu Weibin Jiang Xianping Wang Qianfeng Fang The Microstructural Evolution and Mechanical Properties of Boron-Doped Ti<sub>35</sub>Zr<sub>30</sub>V<sub>10</sub>Nb<sub>25</sub> Refractory High-Entropy Alloy Crystals refractory HEAs boron microstructure mechanical properties |
| title | The Microstructural Evolution and Mechanical Properties of Boron-Doped Ti<sub>35</sub>Zr<sub>30</sub>V<sub>10</sub>Nb<sub>25</sub> Refractory High-Entropy Alloy |
| title_full | The Microstructural Evolution and Mechanical Properties of Boron-Doped Ti<sub>35</sub>Zr<sub>30</sub>V<sub>10</sub>Nb<sub>25</sub> Refractory High-Entropy Alloy |
| title_fullStr | The Microstructural Evolution and Mechanical Properties of Boron-Doped Ti<sub>35</sub>Zr<sub>30</sub>V<sub>10</sub>Nb<sub>25</sub> Refractory High-Entropy Alloy |
| title_full_unstemmed | The Microstructural Evolution and Mechanical Properties of Boron-Doped Ti<sub>35</sub>Zr<sub>30</sub>V<sub>10</sub>Nb<sub>25</sub> Refractory High-Entropy Alloy |
| title_short | The Microstructural Evolution and Mechanical Properties of Boron-Doped Ti<sub>35</sub>Zr<sub>30</sub>V<sub>10</sub>Nb<sub>25</sub> Refractory High-Entropy Alloy |
| title_sort | microstructural evolution and mechanical properties of boron doped ti sub 35 sub zr sub 30 sub v sub 10 sub nb sub 25 sub refractory high entropy alloy |
| topic | refractory HEAs boron microstructure mechanical properties |
| url | https://www.mdpi.com/2073-4352/14/12/1029 |
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