EFFECTS OF MAGNETIC FLUX DENSITY AND TENSILE STRESS ON THE MAGNETIC BARKHAUSEN NOISE IN PIPELINE STEEL
作者:
AJAY DHAR,
D.L. ATHERTON,
期刊:
Nondestructive Testing and Evaluation
(Taylor Available online 1993)
卷期:
Volume 10,
issue 5
页码: 287-294
ISSN:1058-9759
年代: 1993
DOI:10.1080/10589759308952802
出版商: Taylor & Francis Group
关键词: Barkhausen noise;magnetic;pipeline steel;stress;tension;flux density
数据来源: Taylor
摘要:
Magnetic Barkhausen noise ( MBN) measurements were made on a sample of pipeline steel to study the effect of magnetic flux density on the tensile stress dependence of MBN. The results suggest that MBN activity generally increases with flux density but begins to decrease slightly at higher flux densities. Similar behaviour is found at all tensile stress levels both when the stress is parallel and perpendicular to the applied field. The stress dependence of the MBN also shows a strong dependence on the flux density. However, at high flux density when the magnetic field is perpendicular to the stress, the MBN rms voltage saturates with increasing stress. These results are explained in terms of domain wall dynamics by considering the effect of the relative orientations of the magnetic flux density and applied tensile stress with respect to the easy axis of magnetization of the sample.
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