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

Explosive welding (EXW) is the one high-energy-rate metalworking operations, which leads to metals joining as an effect of a collision of plates at high velocities. The collision is caused by a controlled detonation of an explosive charge, which accelerates a top (flyer) clad towards a fixed bottom (base) metal or alloy sheet. Due to the high velocity collision the metallic clads are subjected to high pressure, temperature and high deformation rates. Such conditions lead to formation of various microstructures and phase compositions, as well as provide severe plastic deformation of the material located close to the bonding zone. The final form of created weld is an effect of used joining parameters and type of joined materials.
In the presented research, the Cu/P265GH steel interface zone produced by EXW was subjected to detailed microstructure characterization in terms of formed waviness, melted areas phase composition and degree of joined materials’ deformation. Analysis was done by the variety of scanning and transmission electron microscopy techniques.

Acknowledgments
This research was financially supported by the Institute of Metallurgy and Materials Science of the Polish Academy of Sciences within the statutory work “The interface zone of the welds obtained with the use of explosion energy” Z-5/2021. The SEM and TEM research was conducted in the Accredited Testing Laboratories at the IMMS PAS.