INFLUENCES OF ENVIRONMENT MAGNETIC FIELD ON STRESS-MAGNETISM EFFECT FOR 20 STEEL FERROMAGNETIC ITEMS

Stress-magnetism effect is elementary theory of metal magnetic memory testing technology,and is also key problem to probe related mechanism essence. Curves of magnetizing status versus stress at different environment magnetic field were measured for 20 steel ferromagnetic items. It were founds that influences of environment magnetic field on stress-magnetism effect were very obvious. It shows that estimating system in quantify of metal magnetic memory testing technology is involved in geomagnetic field.