THE EFFECT OF DYNAMIC ELECTROPULSING ON MECHANICAL AND MICROSTRUCTUAL PROPERTIES OF COLD ROLLED Fe-6.5Si ALLOY SHEET

摘要

Fe-6.5%Si alloy is a very excellent soft magnetic material compared with conventional Si steel (Si content ≤ 3.5%), especially in high frequencies with reduced iron losses and noises. But it is hard to be fabricated due to its brittleness at room temperature. Dynamic electropulsing is applied to the cold rolled Fe-6.5%Si sheet during tensile deformation. Mechanical and microstructural properties are investigated with different electropulsing and strain rate. It is found that the yield stress decreases and the elongation increases dramatically with the application of dynamic electropulsing. It is indicated that the work hardening could be reduced with the dynamic electropulsing during deformation, which provides a promising way to fabricate this alloy sheet much easier.