Core microstructure of materials such as Grain size/morphology, Cementite content, Retained austenite, Martensite content, Crystal orientation, Precipitated phase state, Dislocation density, etc., provide unique insights for material R&D, process validation and failure analysis. Focus on 3MA and other NDE technologies: Based on the fusion analysis of multiple micromagnetic parameters (Hysteresis, Barkhausen noise, Eddy current, Impedance), we can realize rapid and non-destructive characterization of microstructure & properties.