Diode Laser Welding/Brazing of Aluminum Alloy to Steel Using a Nickel Coating
Joining Al alloy to steel is of great interest for application in the automotive industry. Although a vast number of studies have been conducted to join Al to steel, the joining of Al to steel is still challenging due to the formation of brittle Fe–Al intermetallic compounds. In this work,...
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MDPI AG
2018-06-01
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| Series: | Applied Sciences |
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| Online Access: | http://www.mdpi.com/2076-3417/8/6/922 |
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| author | Jin Yang Jieshi Chen Wanqin Zhao Peilei Zhang Zhishui Yu Yulong Li Zhi Zeng Norman Zhou |
| author_facet | Jin Yang Jieshi Chen Wanqin Zhao Peilei Zhang Zhishui Yu Yulong Li Zhi Zeng Norman Zhou |
| author_sort | Jin Yang |
| collection | DOAJ |
| description | Joining Al alloy to steel is of great interest for application in the automotive industry. Although a vast number of studies have been conducted to join Al to steel, the joining of Al to steel is still challenging due to the formation of brittle Fe–Al intermetallic compounds. In this work, the microstructure and mechanical properties of the dissimilar Al/steel joints with and without a nickel coating are comparatively investigated. A homogenous reaction layer composed of FeZn10 and Fe2Al5 is formed at the interface in the joints without Ni coating, and the joint facture load is only 743 N. To prevent the formation of brittle Fe2Al5, Ni electroplated coating is applied onto a steel surface. It has been shown that a nonhomogeneous reaction layer is observed at the interfacial region: Ni5Zn21 is formed at the direct irradiation zone, while Al3Ni is formed at the fusion zone root. The microhardness of the interfacial layer is reduced, which leads to the improvement of the joint mechanical properties. The average fracture load of the Al/Ni-coated steel joints reaches 930 N. In all of the cases, failure occurs at the Ni coating/fusion zone interface. |
| first_indexed | 2024-12-19T19:51:34Z |
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| id | doaj.art-810d849c3bf043eeb2d3c79d4b5d2105 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-12-19T19:51:34Z |
| publishDate | 2018-06-01 |
| publisher | MDPI AG |
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| series | Applied Sciences |
| spelling | doaj.art-810d849c3bf043eeb2d3c79d4b5d21052022-12-21T20:07:57ZengMDPI AGApplied Sciences2076-34172018-06-018692210.3390/app8060922app8060922Diode Laser Welding/Brazing of Aluminum Alloy to Steel Using a Nickel CoatingJin Yang0Jieshi Chen1Wanqin Zhao2Peilei Zhang3Zhishui Yu4Yulong Li5Zhi Zeng6Norman Zhou7School of Materials Engineering, Shanghai University of Engineering Science, Shanghai 201620, ChinaSchool of Materials Engineering, Shanghai University of Engineering Science, Shanghai 201620, ChinaSchool of Materials Engineering, Shanghai University of Engineering Science, Shanghai 201620, ChinaSchool of Materials Engineering, Shanghai University of Engineering Science, Shanghai 201620, ChinaSchool of Materials Engineering, Shanghai University of Engineering Science, Shanghai 201620, ChinaKey Laboratory of Robot and Welding Automation of Jiangxi Province, School of Mechanical and Electrical Engineering, Nanchang University, Nanchang 330031, ChinaSchool of Mechanical, Electronic, and Industrial Engineering, University of Electronic Science and Technology of China, Chengdu 611731, ChinaCenter for Advanced Materials Joining, University of Waterloo, Waterloo, ON N2L 3G1, CanadaJoining Al alloy to steel is of great interest for application in the automotive industry. Although a vast number of studies have been conducted to join Al to steel, the joining of Al to steel is still challenging due to the formation of brittle Fe–Al intermetallic compounds. In this work, the microstructure and mechanical properties of the dissimilar Al/steel joints with and without a nickel coating are comparatively investigated. A homogenous reaction layer composed of FeZn10 and Fe2Al5 is formed at the interface in the joints without Ni coating, and the joint facture load is only 743 N. To prevent the formation of brittle Fe2Al5, Ni electroplated coating is applied onto a steel surface. It has been shown that a nonhomogeneous reaction layer is observed at the interfacial region: Ni5Zn21 is formed at the direct irradiation zone, while Al3Ni is formed at the fusion zone root. The microhardness of the interfacial layer is reduced, which leads to the improvement of the joint mechanical properties. The average fracture load of the Al/Ni-coated steel joints reaches 930 N. In all of the cases, failure occurs at the Ni coating/fusion zone interface.http://www.mdpi.com/2076-3417/8/6/922laser welding/brazingaluminum alloyNi coatinginterfacial microstructureintermetallic compoundsmechanical properties |
| spellingShingle | Jin Yang Jieshi Chen Wanqin Zhao Peilei Zhang Zhishui Yu Yulong Li Zhi Zeng Norman Zhou Diode Laser Welding/Brazing of Aluminum Alloy to Steel Using a Nickel Coating Applied Sciences laser welding/brazing aluminum alloy Ni coating interfacial microstructure intermetallic compounds mechanical properties |
| title | Diode Laser Welding/Brazing of Aluminum Alloy to Steel Using a Nickel Coating |
| title_full | Diode Laser Welding/Brazing of Aluminum Alloy to Steel Using a Nickel Coating |
| title_fullStr | Diode Laser Welding/Brazing of Aluminum Alloy to Steel Using a Nickel Coating |
| title_full_unstemmed | Diode Laser Welding/Brazing of Aluminum Alloy to Steel Using a Nickel Coating |
| title_short | Diode Laser Welding/Brazing of Aluminum Alloy to Steel Using a Nickel Coating |
| title_sort | diode laser welding brazing of aluminum alloy to steel using a nickel coating |
| topic | laser welding/brazing aluminum alloy Ni coating interfacial microstructure intermetallic compounds mechanical properties |
| url | http://www.mdpi.com/2076-3417/8/6/922 |
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