Fatigue softening and hardening in mild steel detected from Barkhausen noise
- Resource Type
- Periodical
- Authors
- Karjalainen, L.; Moilanen, M.
- Source
- IEEE Transactions on Magnetics IEEE Trans. Magn. Magnetics, IEEE Transactions on. 16(3):514-517 May, 1980
- Subject
- Fields, Waves and Electromagnetics
Fatigue
Softening
Steel
Magnetic noise
Capacitive sensors
Noise measurement
Tensile stress
Testing
Magnetic field measurement
Signal to noise ratio
- Language
- ISSN
- 0018-9464
1941-0069
The measurement of Barkhausen noise is used to follow the fatigue process in a mild steel. The variation in the root-mean-square (rms) value of the noise with bending stress during single-strain cycles and in unloaded samples is determined at several stages of fatigue life. The fatigue softening and hardening are found to be sensitively revealed by specific changes in the shape and area of the noise versus stress loops and also in the variation in the noise in unloaded samples, corresponding to changes in the residual stress state. The high sensitivity of the magnetic measurement technique is emphasized.