The Influence of Biaxial Symmetric Tension on the Magnetic Properties of a Composite Specimen Made of Two Steel Plates with Different Mechanical and Magnetic Properties

The paper presents the results of studying the evolution of magnetic characteristics of a two-layer material consisting of layers of annealed sheet low-carbon steel grade 15 and sheet metastable austenitic steel grade 12Kh18N9T differing in magnetic hardness subjected to cold rolling with a reduction of 50% under biaxial symmetric tension. Experiments on biaxial deformation were performed on an original biaxial testing machine that allows determining the physical properties of materials during elastic-plastic deformation independently along two axes. It is shown that the coercive force of the studied two-layer material, monotonically changing over the entire range of elastic-plastic biaxial deformation, can be used as an informative parameter for assessing stresses and strains.