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Article
Effects of surface condition on Barkhausen emissions from steel
Journal of Applied Physics
  • Anthony p. Parakka, Iowa State University
  • David C. Jiles, Iowa State University
  • H. Gupta, University of Connecticut
  • S. Jalics, Delphi Chassis
Document Type
Article
Publication Date
4-15-1996
DOI
10.1063/1.362085
Abstract
Temperature changes during mechanical processing such as grinding of steel parts can cause phase changes in the microstructure. Thermal shock during the process can give rise to localized surface residual stress. The net result can be reduced wear resistance and fatigue life leading to early failure during service. Effective methods for the detection of such damage are necessary. Barkhausen emissions, which arise from discontinuous motion of domain walls, are sensitive to microstructual changes that affect domain dynamics. Detected Barkhausen signals are predominantly from a surface layer about 200 μm thick, those from deeper being attenuated due to eddy currents. An analysis of the detected signals can provide an indication of the surface condition of the material.Barkhausen signals from parts ground under controlled conditions were found to be dependent on the grinding process conditions. The signal changes were consistent with residual stress measured by x‐ray diffraction and with hardness measurements that are indicative of changes in microstructure.
Comments

The following article appeared in Journal of Applied Physics 79 (1996): 6045 and may be found at http://dx.doi.org/10.1063/1.362085.

Rights
Copyright 1996 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.
Copyright Owner
American Institute of Physics
Language
en
File Format
application/pdf
Citation Information
Anthony p. Parakka, David C. Jiles, H. Gupta and S. Jalics. "Effects of surface condition on Barkhausen emissions from steel" Journal of Applied Physics Vol. 79 Iss. 8 (1996) p. 6045 - 6046
Available at: http://works.bepress.com/david_jiles/113/