Prime Suspects & Evidence
1.Thermal Assassin (Heat)
Weapon: Exceeded Curie Point (80-150°C), scrambling magnetic domains
Smoking Gun: Eddy currents from rapid cycles caused localized demagnetization
2.Surface Saboteur (Contact)
Crime: Air gaps from rough surfaces (Ra >6.3μm) slashed flux by 60%
Fingerprints: Oil residue trapped in SEM scans acted as magnetic insulator
3.Field Conspirator (EM Interference)
Plot: Stray welding fields (≥50mT) induced “amnesia” in coercivity (HcJ 12kOe)
Alibi Busted: Degaussing errors left opposing fields in Gauss meter logs
Verdict & Protocol
Guilt Ratio: Heat (42%) > Surface (33%) > EMF (25%)
Prevention Kit:
IR cameras for thermal surveillance
Surface profile gauges (ISO 8501-1 compliance)
μ-metal shields against stray fields
Treat magnets like coworkers – no burnout (heat), no junk food (dirt), and no office drama (EMF). Happy lifting!
