Effects of Cr Content on Microstructure and Mechanical Properties of AlCoCrxFeNi High-Entropy Alloy
In this study, we investigated the effects of Cr content on the crystal structure, microstructure, and mechanical properties of four AlCoCrxFeNi (x = 0.3, 0.5, 0.7, and 1.0, in molar ratio) high-entropy alloys. AlCoCr0.3FeNi alloy contains duplex phases, which are ordered BCC phase and FCC phase. As...
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Wiley
2018-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2018/5826467 |
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| author | Tao-Tsung Shun Wei-Jhe Hung |
| author_facet | Tao-Tsung Shun Wei-Jhe Hung |
| author_sort | Tao-Tsung Shun |
| collection | DOAJ |
| description | In this study, we investigated the effects of Cr content on the crystal structure, microstructure, and mechanical properties of four AlCoCrxFeNi (x = 0.3, 0.5, 0.7, and 1.0, in molar ratio) high-entropy alloys. AlCoCr0.3FeNi alloy contains duplex phases, which are ordered BCC phase and FCC phase. As the Cr content increases to x = 1.0, the FCC phase disappears and the microstructure exhibits a spinodal structure formed by a BCC phase and an ordered BCC phase. This result indicates that Cr is a BCC former in AlCoCrxFeNi alloys. With increasing Cr content, the alloy hardness increases from HV415 to HV498. AlCoCr0.3FeNi, AlCoCr0.5FeNi, and AlCoCr0.7FeNi exhibit a high compressive fracture strain of about 0.24 because of the formation of the FCC phase in the BCC matrix. Moreover, the highest yield stress of 1394 MPa and compressive strength of 1841 MPa presented by AlCoCrFeNi alloy are due to the existence of a nano-net-like spinodal structure. |
| format | Article |
| id | doaj-art-da45c8de51b34da4ae28cecd8bd63183 |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
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| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-da45c8de51b34da4ae28cecd8bd631832025-02-03T01:10:42ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422018-01-01201810.1155/2018/58264675826467Effects of Cr Content on Microstructure and Mechanical Properties of AlCoCrxFeNi High-Entropy AlloyTao-Tsung Shun0Wei-Jhe Hung1Department of Materials Science and Engineering, Feng Chia University, Taichung 407, TaiwanDepartment of Materials Science and Engineering, Feng Chia University, Taichung 407, TaiwanIn this study, we investigated the effects of Cr content on the crystal structure, microstructure, and mechanical properties of four AlCoCrxFeNi (x = 0.3, 0.5, 0.7, and 1.0, in molar ratio) high-entropy alloys. AlCoCr0.3FeNi alloy contains duplex phases, which are ordered BCC phase and FCC phase. As the Cr content increases to x = 1.0, the FCC phase disappears and the microstructure exhibits a spinodal structure formed by a BCC phase and an ordered BCC phase. This result indicates that Cr is a BCC former in AlCoCrxFeNi alloys. With increasing Cr content, the alloy hardness increases from HV415 to HV498. AlCoCr0.3FeNi, AlCoCr0.5FeNi, and AlCoCr0.7FeNi exhibit a high compressive fracture strain of about 0.24 because of the formation of the FCC phase in the BCC matrix. Moreover, the highest yield stress of 1394 MPa and compressive strength of 1841 MPa presented by AlCoCrFeNi alloy are due to the existence of a nano-net-like spinodal structure.http://dx.doi.org/10.1155/2018/5826467 |
| spellingShingle | Tao-Tsung Shun Wei-Jhe Hung Effects of Cr Content on Microstructure and Mechanical Properties of AlCoCrxFeNi High-Entropy Alloy Advances in Materials Science and Engineering |
| title | Effects of Cr Content on Microstructure and Mechanical Properties of AlCoCrxFeNi High-Entropy Alloy |
| title_full | Effects of Cr Content on Microstructure and Mechanical Properties of AlCoCrxFeNi High-Entropy Alloy |
| title_fullStr | Effects of Cr Content on Microstructure and Mechanical Properties of AlCoCrxFeNi High-Entropy Alloy |
| title_full_unstemmed | Effects of Cr Content on Microstructure and Mechanical Properties of AlCoCrxFeNi High-Entropy Alloy |
| title_short | Effects of Cr Content on Microstructure and Mechanical Properties of AlCoCrxFeNi High-Entropy Alloy |
| title_sort | effects of cr content on microstructure and mechanical properties of alcocrxfeni high entropy alloy |
| url | http://dx.doi.org/10.1155/2018/5826467 |
| work_keys_str_mv | AT taotsungshun effectsofcrcontentonmicrostructureandmechanicalpropertiesofalcocrxfenihighentropyalloy AT weijhehung effectsofcrcontentonmicrostructureandmechanicalpropertiesofalcocrxfenihighentropyalloy |