Scanning squid microscope differentiation of ferromagnetic steel phases

被引：8
|
作者：
Shaw, TJ
Chan, JW
Kang, SH
McDermott, R
Morris, JW [1 ]
Clarke, J
机构：
[1] Univ Calif Berkeley, Dept Mat Sci, Berkeley, CA 94720 USA
[2] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA
[3] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA
来源：
ACTA MATERIALIA | 2000年 / 48卷 / 10期
关键词：
non-destructive evaluation; steels; magnetic methods; SQUID; optical microscopy;
D O I：
10.1016/S1359-6454(00)00062-8
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The remanent magnetization of ferromagnetic steel with five different microstructures has been studied using a microscope based on a high-transition-temperature d.c. Superconducting QUantum Interference Device (SQUID). The samples were prepared using different heat treatments, beginning with the same material composition. Each sample was magnetized in turn in a magnetic field of 50 mT, and the remanent magnetization was studied by scanning the sample over the SQUID using a two-dimensional translation stage with a range of 50 x 50 mm(2). With a sample-to-SQUID separation of 400-500 mu m, this procedure yielded a two-dimensional magnetic field image produced by the local remanent magnetization of the sample. In addition, microstructural information has been obtained using optical imaging, allowing the magnetic images to be correlated with the underlying microstructure. (C) 2000 Acta Metallurgica Inc. Published bq Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：2655 / 2664
页数：10
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