Modelling and measurements of induction heating in explosive welding materials

The multilayered materials made with using explosions are used in many industrial applications: tanks, rails, electrodes etc. In order to improve some of their properties, the intermetallic layers between neighboring materials could be created with using heating. The layer thickness is between 100 nm and dozen of micrometers. There are different methods of heating multilayered materials: resistive heating, using a furnace, induction heating. In the paper, the induction heating of a layered material was investigated. Both simulations and measurements were carried out. In order to increase the precision of relatively high temperature measurement (over thousand of Kelvin), three different measuring methods were used and compared with each other: infrared camera, pyrometer, thermocouple. Additionally, for better understanding of phenomena occurring in the materials, a complex numerical model was created and verified experimentally. The model was made based on finite element method - a coupled electromagnetic field with thermal and fluid ones were implemented. For the fluid analysis the CFD software was used. The obtained results show a good conformity between calculations and measurements.