J. Phys. Colloques
Volume 48, Numéro C8, Décembre 1987Fifth European Conference on Internal Friction and Ultrasonic Attenuation in Solids
|Page(s)||C8-407 - C8-412|
J. Phys. Colloques 48 (1987) C8-407-C8-412
RELATION BETWEEN MECHANICAL BARKHAUSEN NOISE AND MAGNETOMECHANICAL INTERNAL FRICTIONB. AUGUSTYNIAK1 et A. VANNES2
1 Institute of Physics, Technical University of Gdansk, PL-80-952 Gdansk, PL-80-952Gdansk, Poland
2 Groupe d'Etudes de Métallurgie Physique et de Physique des Matériaux, LA 341, INSA de Lyon, Bât. 502, F-69621 Villeurbanne Cedex, France
The mechanical Barkhausen noise (MBN) induced by torsional vibration (80 Hz) was measured for Copt alloy. The shear strain hysteresis loop and the frequency spectrum were analyzed. The amplitude dependence of MBN was discussed and compared with the amplitude dependence of magnetomechanical damping. The maximal intensity of the MBN was found at the shear strain value equal to vibration amplitudes at which the internal friction maximum appears. At the high strain values additionally the stress induced magnetical Barkhausen noise was detected.