Parameters and Depth of Penetration of Barkhausen Noise Analysis

Strand, Douglas J.

doi:10.21236/ada538247

Cited by 1 publication

(1 citation statement)

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“…The different methods measure the stress in various depths. While harmonic analysis has a penetration depth of about 1 mm, MBN, permeability and eddy current only can reach depths of up to 0.2 mm due to the skin effect [2]. The 3MA device has a potential as a NDE method in the automobile and machinery building industry but always needs a calibration to the specific material [3].…”

Section: Introductionmentioning

confidence: 99%

Comparison of Synchrotron Radiation Diffraction and Micromagnetic Stress Analysis in Straightened Steel Pipes

Raatz

Kaack

Staron

et al. 2014

MSF

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The use of magnetic Barkhausen noise (MBN) and harmonic analysis (HA) as non-destructiveevaluation (NDE) techniques in the industrial environment increased in the last years. In our study,we evaluated the potential of those methods to measure residual stress on the surface of straightenedsteel pipes. To study the influence of the pipe manufacturing process and the following straighteningprocess we used pipes of three different straightening levels. The straightening was done with differentparameters, which resulted in a plastic deformation that leaves a visible helix on the surface of thepipes. High energy diffraction experiments were performed to obtain absolute values of residual stresson the surface and in the bulk of the pipe samples. With these residual stress values our MBN and HAdata was calibrated. The surface of all pipes showed high compressive stresses while the highest tensilestresses were 0.5 to 1.4 mm under the surface. The stresses correlate to greater plastic deformationduring the straightening process.

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Section: Introductionmentioning

confidence: 99%