Journal of Materials Science

, Volume 40, Issue 20, pp 5517–5520 | Cite as

Surface decarburisation of steel detected by magnetic barkhausen emission

  • M. Blaow
  • J. T. EvansEmail author
  • B. A. Shaw


The effect of decarburisation of the surface layer on magnetic Barkhausen noise (MBN) emission was investigated in quenched and tempered steel containing 0.67% carbon. The MBN profile of intensity versus energising current from the un-decarburised material showed a single peak typifying the martensite structure. After decarburisation, a profile with a double peak was obtained. The presence of the decarburised layer produced a second, overlapping peak at a lower field value. The height of the second peak increased with increasing depth of decarburisation and its position moved to increasingly lower field values.


Polymer Surface Layer Martensite Single Peak Lower Field 
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Copyright information

© Springer Science + Business Media, Inc. 2005

Authors and Affiliations

  1. 1.Design Unit, School of Mechanical Systems and EngineeringUniversity of Newcastle upon TyneUK

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