Effect of nickel coating on the shear strength of FSW lap joint between Ni–Cu alloy and steel
| Autor: | Rong-Tsong Lee, Huey-Lin Chen, Yuang-Cherng Chiou, Chien-Te Liu |
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| Rok vydání: | 2013 |
| Předmět: |
Materials science
Shear strength test Scanning electron microscope Alloy Metallurgy technology industry and agriculture Metals and Alloys Energy-dispersive X-ray spectroscopy Welding engineering.material Industrial and Manufacturing Engineering Computer Science Applications law.invention Lap joint Coating law Modeling and Simulation Ceramics and Composites engineering Shear strength Composite material |
| Zdroj: | Journal of Materials Processing Technology. 213:69-74 |
| ISSN: | 0924-0136 |
| DOI: | 10.1016/j.jmatprotec.2012.07.014 |
| Popis: | Cu–Ni alloy and low-carbon steel were joined by friction stir lap welding (FSLW) with the help of a nickel coating. The appropriate welding parameters were investigated and the lap joints were analyzed using scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and shear strength testing. The shear strength of joints with a nickel coating was about 2.9 times as high as that of the joints without Ni coating. According to the EDS analysis of the fractured surfaces under the shear strength test, the micro-voids occurred in the Cu–Ni/steel interface without Ni coating, thus reducing the shear strength. These micro-voids were reduced in size using a nickel coating due to the self-diffusion in the Ni/Ni interface at high interface temperature and high contact pressure. The strong bonding mechanism using a nickel coating could be explained by the iron and copper atoms diffusing into the coating through the interface at high interface temperature and holding time. |
| Databáze: | OpenAIRE |
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