EUROPEAN CONGRESS AND EXHIBITION ON ADVANCED MATERIALS AND PROCESSES - EUROMAT 2021

This study contains the comprehensive analysis of the interface zone microstructure formed in A1050/S355J2N bimetal fabricated by explosive welding technology. The flyer plate of a 5 mm in thickness sheet of technically pure aluminum was shot into the base material – a 5 mm thick carbon steel plate of improved strength and weldability. Aluminum alloy is characterized by very good resistance to atmospheric corrosion and high thermal and heat conductivity. Such combination of materials brings very good mechanical properties, especially strength and improved corrosion resistance, which can be applied as an anode for active electrochemical corrosion protection.

In order to characterize the microstructure of the welds, the observations were carried out by means of scanning and transmission electron microscopy techniques. Investigation performed on a cross-sectioned connections allowed study their continuity and interface morphology as well as the microstructural changes of the joined materials in the vicinity of the bonding zone both at the micro and nano scale. Additionally, the crystallographic texture, grain size, grain boundaries distribution of the joined materials in the vicinity of the weld was revealed.