期刊
JOURNAL OF MANUFACTURING AND MATERIALS PROCESSING
卷 6, 期 1, 页码 -出版社
MDPI
DOI: 10.3390/jmmp6010006
关键词
Cu-Al welding; metallographic examination; parameter optimisation; tensile strength; USW
This study evaluates the impact of process parameters on ultrasonic spot weld quality of copper-aluminium plates and achieves satisfactory weld quality by optimizing the parameters.
The demand for joining dissimilar metals has exponentially increased due to the global concerns about climate change, especially for electric vehicles in the automotive industry. Ultrasonic welding (USW) surges as a very promising technique to join dissimilar metals, providing strength and electric conductivity, in addition to avoid metallurgical defects, such as the formation of intermetallic compounds, brittle phases and porosities. However, USW is a very sensitive process, which depends on many parameters. This work evaluates the impact of the process parameters on the quality of ultrasonic spot welds between copper and aluminium plates. The weld quality is assessed based on the tensile strength of the joints and metallographic examination of the weld cross-sections. Furthermore, the welding energy is examined for the different welding conditions. This is done to evaluate the influence of each parameter on the heat input resulting from friction at the weld interface and on the weld quality. From the obtained results, it was possible to optimise parameters to achieve satisfactory weld quality in 1.0 mm thick Al-Cu plate joints in terms of mechanical and metallurgical properties.
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