Corrosion evaluation and microstructural characteristics of 70/30 copper-nickel alloy fabricated by laser powder bed fusion
This study explored the fabrication of 70/30 Cu-Ni via LPBF technique and investigated its corrosion and microstructure properties. Samples were fabricated with varied parameters, including power, scan rate, and hatch spacing, and compared with wrought Cu-Ni alloy. Corrosion behaviour was conducted...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-03-01
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| Series: | Journal of Alloys and Metallurgical Systems |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2949917825000057 |
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| author | Mahdi Nadimi Jie Song Lin Cheng Yao Fu |
| author_facet | Mahdi Nadimi Jie Song Lin Cheng Yao Fu |
| author_sort | Mahdi Nadimi |
| collection | DOAJ |
| description | This study explored the fabrication of 70/30 Cu-Ni via LPBF technique and investigated its corrosion and microstructure properties. Samples were fabricated with varied parameters, including power, scan rate, and hatch spacing, and compared with wrought Cu-Ni alloy. Corrosion behaviour was conducted using cyclic polarization and EIS in 3.5 wt% NaCl. Optical microscopy and EBSD techniques were employed for microstructure evaluation. The results revealed that the examined LPBF samples had surface porosities below 1 %, indicating superior density and minimal voids, with larger grain sizes displaying elongated grain. Additionally, LPBF samples exhibited delayed breakdown passive layer potential, superior repassivation abilities compared to the wrought specimen. EIS analysis revealed corrosion resistance of as-fabricated samples was slightly higher than conventional ones, peaking at 58–73 kΩ.cm2 with hatch spacing between 125 and 200 μm and P/V ratio between 1.7 and 2 J/mm. However, deviation in parameters led to a decrease in corrosion resistance. |
| format | Article |
| id | doaj-art-e455471d40274f4d87eeca37e08edb24 |
| institution | DOAJ |
| issn | 2949-9178 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Alloys and Metallurgical Systems |
| spelling | doaj-art-e455471d40274f4d87eeca37e08edb242025-08-20T02:55:48ZengElsevierJournal of Alloys and Metallurgical Systems2949-91782025-03-01910015510.1016/j.jalmes.2025.100155Corrosion evaluation and microstructural characteristics of 70/30 copper-nickel alloy fabricated by laser powder bed fusionMahdi Nadimi0Jie Song1Lin Cheng2Yao Fu3Department of Aerospace and Ocean Engineering, Virginia Polytechnic Institute and State University, USACollege of Engineering, SUNY Polytechnic Institute, USA; Corresponding author.Department of Mechanical Engineering, University of Maryland, USADepartment of Aerospace and Ocean Engineering, Virginia Polytechnic Institute and State University, USA; Department of Materials Science and Engineering, Virginia Polytechnic Institute and State University, USA; Corresponding author at: Department of Aerospace and Ocean Engineering, Virginia Polytechnic Institute and State University, USA.This study explored the fabrication of 70/30 Cu-Ni via LPBF technique and investigated its corrosion and microstructure properties. Samples were fabricated with varied parameters, including power, scan rate, and hatch spacing, and compared with wrought Cu-Ni alloy. Corrosion behaviour was conducted using cyclic polarization and EIS in 3.5 wt% NaCl. Optical microscopy and EBSD techniques were employed for microstructure evaluation. The results revealed that the examined LPBF samples had surface porosities below 1 %, indicating superior density and minimal voids, with larger grain sizes displaying elongated grain. Additionally, LPBF samples exhibited delayed breakdown passive layer potential, superior repassivation abilities compared to the wrought specimen. EIS analysis revealed corrosion resistance of as-fabricated samples was slightly higher than conventional ones, peaking at 58–73 kΩ.cm2 with hatch spacing between 125 and 200 μm and P/V ratio between 1.7 and 2 J/mm. However, deviation in parameters led to a decrease in corrosion resistance.http://www.sciencedirect.com/science/article/pii/S2949917825000057Corrosion propertiesLaser powder bed fusionCu-Ni alloyMicrostructure3.5 wt% NaCl |
| spellingShingle | Mahdi Nadimi Jie Song Lin Cheng Yao Fu Corrosion evaluation and microstructural characteristics of 70/30 copper-nickel alloy fabricated by laser powder bed fusion Journal of Alloys and Metallurgical Systems Corrosion properties Laser powder bed fusion Cu-Ni alloy Microstructure 3.5 wt% NaCl |
| title | Corrosion evaluation and microstructural characteristics of 70/30 copper-nickel alloy fabricated by laser powder bed fusion |
| title_full | Corrosion evaluation and microstructural characteristics of 70/30 copper-nickel alloy fabricated by laser powder bed fusion |
| title_fullStr | Corrosion evaluation and microstructural characteristics of 70/30 copper-nickel alloy fabricated by laser powder bed fusion |
| title_full_unstemmed | Corrosion evaluation and microstructural characteristics of 70/30 copper-nickel alloy fabricated by laser powder bed fusion |
| title_short | Corrosion evaluation and microstructural characteristics of 70/30 copper-nickel alloy fabricated by laser powder bed fusion |
| title_sort | corrosion evaluation and microstructural characteristics of 70 30 copper nickel alloy fabricated by laser powder bed fusion |
| topic | Corrosion properties Laser powder bed fusion Cu-Ni alloy Microstructure 3.5 wt% NaCl |
| url | http://www.sciencedirect.com/science/article/pii/S2949917825000057 |
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