How non-conventional machining affects the surface integrity and magnetic properties of non-oriented electrical steel

Non-oriented electrical steel (NOES) laminations are commonly used to manufacture the rotor and stator core of electric machines. To achieve high machine efficiencies, it is desirable for these NOES be able a saturation magnetisation whilst incurring minimal losses. It known that inappropriate machining could cause significant deterioration in their magnetic properties. However, mechanisms by which influences this less understood. This study investigates after four nonconventional methods: Abrasive Waterjet, Wire Electric Discharge Machining, Pulsed Laser, Continuous Wave Laser. An in-depth investigation surface integrity through range methods, i.e., topography, scanning electron microscopy (SEM), nanoindentation, backscatter diffraction (EBSD), domain imaging, were conducted causing deterioration. The using conventional methods (e.g., microstructure texture), was found not relevance unless combined with analysis on how affects micro-magnetic structure. paper, first time, highlights aspect attempts make initial quantitative evaluations domains affected superficial layer result non-conventional machining.