The microstructure and mechanical properties of novel Fe-rich Fe–Cr–Ni–Ta eutectic multi-principal element alloys
Co–Cr–Fe–Ni–Ta eutectic multi-principal element alloys (MPEAs) demonstrate great potential to replace structural alloys in engineering applications. However, the cost of these alloys is high due to the usage of a number of precious metals. To decrease the cost, the present work developed a set of no...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-09-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785423021762 |
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| author | Jiatong Li Wanyuan Gui Wenyi Peng Yuxian Cao Xiayan Wang Zi Jin Yang Yi Yuhai Qu |
| author_facet | Jiatong Li Wanyuan Gui Wenyi Peng Yuxian Cao Xiayan Wang Zi Jin Yang Yi Yuhai Qu |
| author_sort | Jiatong Li |
| collection | DOAJ |
| description | Co–Cr–Fe–Ni–Ta eutectic multi-principal element alloys (MPEAs) demonstrate great potential to replace structural alloys in engineering applications. However, the cost of these alloys is high due to the usage of a number of precious metals. To decrease the cost, the present work developed a set of novel Fe55Cr15Ni30−xTax (x = 0, 5, 8, 10 and 15 at.%) eutectic MPEAs and the effect of Ta on microstructure and compressive mechanical properties were investigated for the first time. As the Ta content increases, the microstructure changes from a single-phase FCC solid solution (x = 0) to hypoeutectic microstructure (x = 6), then to eutectic microstructure (x = 8), and eventually to hypereutectic microstructure (x = 10 and 15). The yield strength and the hardness increase at the expense of ductility reduction with increasing Ta content. The strengthening mechanism of this alloy system is mainly second-phase strengthening caused by Laves phase and grain boundary strengthening produced by eutectic interface, supplemented by solid solution strengthening. The Fe55Cr15Ni22Ta8 and Fe55Cr15Ni20Ta10 alloys present the excellent comprehensive mechanical properties. The yield strength, fracture strength and fracture strain of the former are 838 MPa, 1994 MPa and 45.1%, respectively. The yield strength, fracture strength and fracture strain of the latter are 1029 MPa, 1956 MPa and 43.0%, respectively. The phase formation of Fe55Cr15Ni30−xTax alloys can be predicted by Md criterion. When Md ≥ 0.89, the alloys consist of FCC phase and Laves phase. Otherwise, the alloys consist of FCC single phase. |
| first_indexed | 2024-03-11T15:05:05Z |
| format | Article |
| id | doaj.art-bfda19e6d9ed4fd89a98e70cf3efe060 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-03-11T15:05:05Z |
| publishDate | 2023-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-bfda19e6d9ed4fd89a98e70cf3efe0602023-10-30T06:04:25ZengElsevierJournal of Materials Research and Technology2238-78542023-09-012672737283The microstructure and mechanical properties of novel Fe-rich Fe–Cr–Ni–Ta eutectic multi-principal element alloysJiatong Li0Wanyuan Gui1Wenyi Peng2Yuxian Cao3Xiayan Wang4Zi Jin5Yang Yi6Yuhai Qu7School of Physics and Materials Science, Nanchang University, Nanchang, 330031, ChinaNational Center for Materials Service Safety, University of Science and Technology Beijing, Beijing, 100083, ChinaSchool of Physics and Materials Science, Nanchang University, Nanchang, 330031, ChinaState Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing, 100083, ChinaSchool of Physics and Materials Science, Nanchang University, Nanchang, 330031, ChinaSchool of Physics and Materials Science, Nanchang University, Nanchang, 330031, ChinaSchool of Physics and Materials Science, Nanchang University, Nanchang, 330031, ChinaSchool of Physics and Materials Science, Nanchang University, Nanchang, 330031, China; Chongqing Research Institute of Nanchang University, Chongqing 402660, China; Corresponding author. School of Physics and Materials Science, Nanchang University, Nanchang, 330031, China.Co–Cr–Fe–Ni–Ta eutectic multi-principal element alloys (MPEAs) demonstrate great potential to replace structural alloys in engineering applications. However, the cost of these alloys is high due to the usage of a number of precious metals. To decrease the cost, the present work developed a set of novel Fe55Cr15Ni30−xTax (x = 0, 5, 8, 10 and 15 at.%) eutectic MPEAs and the effect of Ta on microstructure and compressive mechanical properties were investigated for the first time. As the Ta content increases, the microstructure changes from a single-phase FCC solid solution (x = 0) to hypoeutectic microstructure (x = 6), then to eutectic microstructure (x = 8), and eventually to hypereutectic microstructure (x = 10 and 15). The yield strength and the hardness increase at the expense of ductility reduction with increasing Ta content. The strengthening mechanism of this alloy system is mainly second-phase strengthening caused by Laves phase and grain boundary strengthening produced by eutectic interface, supplemented by solid solution strengthening. The Fe55Cr15Ni22Ta8 and Fe55Cr15Ni20Ta10 alloys present the excellent comprehensive mechanical properties. The yield strength, fracture strength and fracture strain of the former are 838 MPa, 1994 MPa and 45.1%, respectively. The yield strength, fracture strength and fracture strain of the latter are 1029 MPa, 1956 MPa and 43.0%, respectively. The phase formation of Fe55Cr15Ni30−xTax alloys can be predicted by Md criterion. When Md ≥ 0.89, the alloys consist of FCC phase and Laves phase. Otherwise, the alloys consist of FCC single phase.http://www.sciencedirect.com/science/article/pii/S2238785423021762Fe-based alloysEutecticMechanical properties |
| spellingShingle | Jiatong Li Wanyuan Gui Wenyi Peng Yuxian Cao Xiayan Wang Zi Jin Yang Yi Yuhai Qu The microstructure and mechanical properties of novel Fe-rich Fe–Cr–Ni–Ta eutectic multi-principal element alloys Journal of Materials Research and Technology Fe-based alloys Eutectic Mechanical properties |
| title | The microstructure and mechanical properties of novel Fe-rich Fe–Cr–Ni–Ta eutectic multi-principal element alloys |
| title_full | The microstructure and mechanical properties of novel Fe-rich Fe–Cr–Ni–Ta eutectic multi-principal element alloys |
| title_fullStr | The microstructure and mechanical properties of novel Fe-rich Fe–Cr–Ni–Ta eutectic multi-principal element alloys |
| title_full_unstemmed | The microstructure and mechanical properties of novel Fe-rich Fe–Cr–Ni–Ta eutectic multi-principal element alloys |
| title_short | The microstructure and mechanical properties of novel Fe-rich Fe–Cr–Ni–Ta eutectic multi-principal element alloys |
| title_sort | microstructure and mechanical properties of novel fe rich fe cr ni ta eutectic multi principal element alloys |
| topic | Fe-based alloys Eutectic Mechanical properties |
| url | http://www.sciencedirect.com/science/article/pii/S2238785423021762 |
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