Abstract
The main trend in the automotive industry today is the reduction in vehicle weight. The problem is addressed first and foremost by the use of different types of light and high strength materials in the production of the car body. Although galvanized steel sheet is still the basic construction material, nowadays aluminium alloy sheets are increasingly used in the production of vehicles. This paper is focused on the optimization of process parameters by resistance spot welding dissimilar materials: galvanized steel sheet and sheet made of aluminium.

Key words
resistance spot welding, steel/aluminium joints, weld nugget, properties

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