Infrared Brazing of CoCrFeMnNi Equiatomic High Entropy Alloy Using Nickel-Based Braze Alloys
Infrared vacuum brazing of CoCrFeMnNi high entropy alloy (HEA) using BNi-2 and MBF601 fillers has been investigated. Both brazes show poor wettability at temperatures only 20 °C above their liquidus temperatures. However, the wettability of BNi-2 and MBF601 fillers on CoCrFeMnNi HEA is great...
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| Format: | Article |
| Language: | English |
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MDPI AG
2019-03-01
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| Series: | Entropy |
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| Online Access: | http://www.mdpi.com/1099-4300/21/3/283 |
| _version_ | 1828109499471233024 |
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| author | Chieh Lin Ren-Kae Shiue Shyi-Kaan Wu Huai-Li Huang |
| author_facet | Chieh Lin Ren-Kae Shiue Shyi-Kaan Wu Huai-Li Huang |
| author_sort | Chieh Lin |
| collection | DOAJ |
| description | Infrared vacuum brazing of CoCrFeMnNi high entropy alloy (HEA) using BNi-2 and MBF601 fillers has been investigated. Both brazes show poor wettability at temperatures only 20 °C above their liquidus temperatures. However, the wettability of BNi-2 and MBF601 fillers on CoCrFeMnNi HEA is greatly improved with increasing the test temperatures, 50 °C above their liquidus temperatures. The BNi-2 brazed joints are dominated by Ni-rich matrix with huge CrB and a few tiny boride precipitates. Average shear strengths of joints increase with increasing brazing temperature and/or time, and fracture location changes from blocky CrB in the brazed zone to grain boundary boride in the substrate. The MBF601 brazed joints are composed of CoCrFeMnNi-based matrix, particles of B/Co/Cr/Fe/Mn/Ni/P compounds, and some phosphides form along the grain boundaries of the substrate. The specimen brazed with MBF601 filler foil at 1050 °C for 600 s has the highest average shear strength of 321 MPa, while that brazed at 1080 °C for 600 s has a lower average shear strength of 271 MPa due to the presence of solidification shrinkage voids. |
| first_indexed | 2024-04-11T11:03:19Z |
| format | Article |
| id | doaj.art-bfae07d450fc4944b72fc997340912f5 |
| institution | Directory Open Access Journal |
| issn | 1099-4300 |
| language | English |
| last_indexed | 2024-04-11T11:03:19Z |
| publishDate | 2019-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Entropy |
| spelling | doaj.art-bfae07d450fc4944b72fc997340912f52022-12-22T04:28:27ZengMDPI AGEntropy1099-43002019-03-0121328310.3390/e21030283e21030283Infrared Brazing of CoCrFeMnNi Equiatomic High Entropy Alloy Using Nickel-Based Braze AlloysChieh Lin0Ren-Kae Shiue1Shyi-Kaan Wu2Huai-Li Huang3Department of Materials Science and Engineering, National Taiwan University, Taipei 106, TaiwanDepartment of Materials Science and Engineering, National Taiwan University, Taipei 106, TaiwanDepartment of Materials Science and Engineering, National Taiwan University, Taipei 106, TaiwanDepartment of Mechanical Engineering, National Taiwan University, Taipei 106, TaiwanInfrared vacuum brazing of CoCrFeMnNi high entropy alloy (HEA) using BNi-2 and MBF601 fillers has been investigated. Both brazes show poor wettability at temperatures only 20 °C above their liquidus temperatures. However, the wettability of BNi-2 and MBF601 fillers on CoCrFeMnNi HEA is greatly improved with increasing the test temperatures, 50 °C above their liquidus temperatures. The BNi-2 brazed joints are dominated by Ni-rich matrix with huge CrB and a few tiny boride precipitates. Average shear strengths of joints increase with increasing brazing temperature and/or time, and fracture location changes from blocky CrB in the brazed zone to grain boundary boride in the substrate. The MBF601 brazed joints are composed of CoCrFeMnNi-based matrix, particles of B/Co/Cr/Fe/Mn/Ni/P compounds, and some phosphides form along the grain boundaries of the substrate. The specimen brazed with MBF601 filler foil at 1050 °C for 600 s has the highest average shear strength of 321 MPa, while that brazed at 1080 °C for 600 s has a lower average shear strength of 271 MPa due to the presence of solidification shrinkage voids.http://www.mdpi.com/1099-4300/21/3/283high entropy materialsinfrared brazingnickel-based filler metalmicrostructure |
| spellingShingle | Chieh Lin Ren-Kae Shiue Shyi-Kaan Wu Huai-Li Huang Infrared Brazing of CoCrFeMnNi Equiatomic High Entropy Alloy Using Nickel-Based Braze Alloys Entropy high entropy materials infrared brazing nickel-based filler metal microstructure |
| title | Infrared Brazing of CoCrFeMnNi Equiatomic High Entropy Alloy Using Nickel-Based Braze Alloys |
| title_full | Infrared Brazing of CoCrFeMnNi Equiatomic High Entropy Alloy Using Nickel-Based Braze Alloys |
| title_fullStr | Infrared Brazing of CoCrFeMnNi Equiatomic High Entropy Alloy Using Nickel-Based Braze Alloys |
| title_full_unstemmed | Infrared Brazing of CoCrFeMnNi Equiatomic High Entropy Alloy Using Nickel-Based Braze Alloys |
| title_short | Infrared Brazing of CoCrFeMnNi Equiatomic High Entropy Alloy Using Nickel-Based Braze Alloys |
| title_sort | infrared brazing of cocrfemnni equiatomic high entropy alloy using nickel based braze alloys |
| topic | high entropy materials infrared brazing nickel-based filler metal microstructure |
| url | http://www.mdpi.com/1099-4300/21/3/283 |
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