高温圧延されたアルフェル合金の等温加熱と磁歪およびヤング弾性率の関係

抄録

The change of magnetostriction and Young’s modulus of hot-rolled “Alfer” sheets, quenched in water and then subjected to heating cycles of one minute heating followed by air cooling at 300°, 400°, 500°, and 600°C were studied. The saturation magnetostriction increased abruptly at the initial step of heating time except at 300°C, and the tendency of the increase was the sharpest at 500°C, sharper at 600°C, and gentle at 400°C. All the specimens showed a distinct maximum at 500°C. The saturation magnetostriction in 45° direction showed a clear two-step variation at 400°C run. The change in Young’s modulus with heating time showed two different tendencies: (A) the young’s modulus decreases to a minimum, then increases to a maximum, and then decreases again; (B) the modulus gradually falls to a constant level. In 500° and 600°C process, the Young’s modulus in 45° direction of A·F-2 specimen (1 mm in thickness) showed abnormal change, and increased to a maximum and then decreased.