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The effect of microstructural changes on magnetic Barkhausen noise and magnetomechanical acoustic emission in Mn–Mo–Ni pressure vessel steel.
- Source :
-
Journal of Applied Physics . 5/1/2000, Vol. 87 Issue 9, p5242. 3p. - Publication Year :
- 2000
-
Abstract
- The effect of microstructural changes on magnetic Barkhausen noise (BN) and magnetomechanical acoustic emission (MAE) in Mn–Mo–Ni pressure-vessel steel with various microstructures was investigated. The BN and MAE signals were strongly influenced by the microstructural features which were characterized by transmission electron micrograph observation. BN energy and the measured area under the rectified signal envelope varied inversely with hardness, and changed with the microstructure. It indicates that they are closely related to the dislocation density and residual stress which act as a barrier to irreversible domain wall motion. © 2000 American Institute of Physics. [ABSTRACT FROM AUTHOR]
- Subjects :
- *MICROSTRUCTURE
*BARKHAUSEN effect
*ACOUSTIC emission
*PRESSURE vessels
Subjects
Details
- Language :
- English
- ISSN :
- 00218979
- Volume :
- 87
- Issue :
- 9
- Database :
- Academic Search Index
- Journal :
- Journal of Applied Physics
- Publication Type :
- Academic Journal
- Accession number :
- 5401369
- Full Text :
- https://doi.org/10.1063/1.373308