Title :
Magnetic Barkhausen Noise in Quenched Carburized Nickel-Steels
Author :
Monlevade, E.F. ; de Campos, M.F. ; Franco, F.A. ; Capo-Sanchez, J. ; Goldenstein, H. ; Padovese, L.R.
Author_Institution :
Steel Div., Mangels Ind. S.A., Sao Bernardo do Campo, Brazil
fDate :
4/1/2012 12:00:00 AM
Abstract :
Two steel sheets, one with 5% Ni and another with 10% Ni, were submitted to carburization and quenching, obtaining a microstructure with martensite and retained austenite. These steels were characterized with magnetic Barkhausen noise (MBN). The Barkhausen signal is distinctively different for the carburized and quenched samples. The carburized and quenched samples present higher coercive field than the annealed samples. X-ray diffraction data indicated that the carburized and quenched samples have high density of dislocations, a consequence of the martensitic transformation.
Keywords :
Barkhausen effect; X-ray diffraction; austenitic steel; coercive force; crystal microstructure; dislocation density; magnetic noise; martensitic steel; martensitic transformations; quenching (thermal); surface hardening; Barkhausen signal; X-ray diffraction data; austenitic steel; coercive field; dislocation density; magnetic Barkhausen noise; martensitic steel; martensitic transformation; microstructure; quenched carburized nickel-steels; steel sheets; Magnetic domain walls; Magnetic domains; Magnetic hysteresis; Magnetomechanical effects; Microstructure; Noise; Steel; Hysteresis; magnetic Barkhausen noise (MBN); martensite; nondestructive evaluation;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2011.2173666
