Investigation of Magnetic Properties of Various Structural Classes Steels in Weak Magnetic Fields Characteristic for Generation of Thermoelectric Currents in Electron Beam Welding

Abstract

The results of studies of magnetic and thermoelectric properties of pearlite, martensitic and austenitic steels, as well as cobalt and nickel based alloys are presented. The magnetization curves for materials from among the studied ones, as well as dependences of absolute thermoelectric power on the material temperature, are obtained. It was found that for ferromagnetic substances in weak magnetic fields the dependence of magnetic induction on the magnetic field strength is non-linear. This allows to conclude that magnetic permeability of such medium is not a constant, but can be described, for example, by a third-order polynomial.

Simulation of Multipoint Contact Under Thermoelectric Testing

“…Another advantage is the simplicity of the technical implementation of this method, the compactness and autonomy of thermoelectric testing devices, ease of sample preparation, and intuitive testing procedure, which does not require special training of personnel. The main application area of the thermoelectric method is testing of metal products: sorting by steel grade, quality control of heat treatment, decarbonized layer, plastic deformation [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. In scientific research, the thermoelectric method is used to measure the Seebeck coefficient [21].…”