期刊
NDT & E INTERNATIONAL
卷 45, 期 1, 页码 148-155出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ndteint.2011.10.003
关键词
Barkhausen noise; Anisotropy; Stainless steel; Magnetic methods; Material characterization
资金
- CAPES
The magnetic behaviour of most commercial ferromagnetic steels is usually anisotropic presenting a magnetic easy axis. Changes in the direction of this axis can be related to mechanical changes and anomalies that occur in the fabrication process. The present work describes a method that uses a device with permanent magnets to create a precise rotational magnetic field. The device measures continuous Magnetic Barkhausen Noise signals related to the angle of magnetization, in order to determine the direction of the macroscopic magnetic easy axis. It also offers the possibility of obtaining real time parameters that quantify the magnetic anisotropy of the sample. (C) 2011 Elsevier Ltd. All rights reserved.
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