Effect of Steel Microstructure on the Bonding of Steel and Nickel by Ultrasonic Welding

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Abstract: Ultrasonic welding (USW) is a solid-state bonding technique useful in bonding dissimilar materials, and has advantages such as short welding time and relatively lower bonding temperature and pressure. In USW, hardness of base metals has been considered as an important factor [1]. For bonding steel and other metallic materials, since hardness of steel relates to its microstructure, steel microstructure is considered to exert an important influence to the formation of bonding interface [2]. However, the understanding of the effect of steel microstructure on the bonding with other dissimilar metals is still limited. So, the main objective of the present study is to investigate the effect of steel microstructure having different hardness on the bonding interface formation between steel and nickel (Ni) during USW. Ni was employed because it does not form any intermetallic compounds with steel.

Authors: J-Y. Lin, S. Nambu and T. Koseki

Keywords: ultrasonic welding, steels, bonding of dissimilar metals, microstructure

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3 pages

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