Advanced Techniques for the Measure of Microstructure and Residual Stress in Components Subject to Rolling Fatigue

Thomas, J; Mohan, Jonathan; Kendrish, Stephen; Fix, Robert M.

doi:10.4271/2009-01-0421

Cited by 1 publication

(3 citation statements)

References 3 publications

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“…For the purpose of this work, the only component of the measurement that was recorded and used for analysis was the magnetoelastic parameter (MP). The MP parameter is the root mean square value (RMS) value of the filtered Barkhausen noise burst [3]. All measurements in this work were completed using the Rollscan 350 finite impulse response (FIR) filter set with a passband from 10 to 70 kHz.…”

Section: Methodsmentioning

confidence: 99%

“…Barkhausen noise is a magnetic noise phenomena that is observed in ferromagnetic materials when they are exposed to a time-varying magnetic field. This phenomena was discovered by Heinrich Barkhausen [1][2][3] and is caused by rapid shifting of the walls of magnetic domains (regions where electron 'spin' arrangements are the same for all atoms) in ferromagnetic materials. With the aid of vacuum tube amplifiers he observed the presence of weak magnetic field noise emanating from ferromagnetic materials when a timevarying magnetic field was applied.…”

Section: Introductionmentioning

confidence: 99%

“…Barkhausen noise is currently used in industry to measure the presence of residual stress and for quality control applications [3]. It has been used to detect a number of different characteristics of ferromagnetic materials including plastic deformation [7], fatigue damage [8], and residual stress [9], and is sensitive to microstructure, stress state, and hardness [6].…”

Section: Introductionmentioning

confidence: 99%

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Barkhausen noise as an intrinsic fingerprint for ferromagnetic components

Mascareñas¹,

Lockhart²,

Lienert³

2018

Smart Mater. Struct.

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In this work, the suitability of magnetic Barkhausen noise as an intrinsic fingerprint of ferromagnetic components is determined. This technique has potential for this application because it is based inherently on the near surface microstructural features of ferromagnetic materials. All materials typically display some variation in their microstructure simply as a result of the manufacturing process (rolling, heat treating, welding, grinding), thus providing the potential that Barkhausen noise measurements between nominally similar components will be unique. In this work, we demonstrate that Barkhausen noise measurements are both repeatable in time for a single sample made from a ferromagnetic material, and unique across a number of instances of nominally similar samples. The results of this work have profound implications in a variety of applications in forensics and physical security. For example, consider the fabrication of the next generation of tamper-evident containers and devices using conventional processes for steel. In addition, since Barkhausen noise is sensitive to changes in microstructures due to grinding and welding, these measurements can be used to detect clandestine repairs and tampering. Finally, because the method inherently results in a time series measurement at each point on a sample, it is expected to have far higher dimensionality than physically similar eddy current measurement. However, the higher dimensionality of Barkhausen measurements suggest that they should be harder to counterfeit than eddy current measurements.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%