Magnetic field properties caused by stress concentration

被引：35

作者：

Huang, SL ^{[1
]}

Li, LM ^{[1
]}

Shi, KR ^{[1
]}

Wang, XF ^{[1
]}

机构：

[1] Tsing Hua Univ, Dept Elect Engn, Beijing 100084, Peoples R China

来源：

JOURNAL OF CENTRAL SOUTH UNIVERSITY OF TECHNOLOGY | 2004年 / 11卷 / 01期

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

magnetic field testing; stress concentration; thermography; acoustic emission; domain;

D O I：

10.1007/s11771-004-0005-6

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Measurements of the effects of tensile stress on magnetic field properties, infrared thermography and acoustic emission of a cuboid sample with an elliptical hole in its center were presented. The tensile stress was applied perpendicularly to the sample by electro-tension machine according to a step-loading curve. The changes of the sample temperature was recorded by an infrared thermography system and the noise of domain reversal was inspected by two acoustic probes, which were placed on each end of the sample near the collets of the electro-tension machine, when the sample was in loading process. The magnetic fields on the surface of the sample were inspected with 8 rum lift-off when the loads were held. Valuable information about the changes of domains was obtained from analysis of acoustic emission signals in loading process. Infrared images of the sample provided complementary information about the state of the sample. The results show that stress concentration in ferromagnetic material affects the direction and structure of domain and generates net magnetic moment on its surface. The distribution and magnitude of the net magnetic moment are correlative with those of stress.

引用

页码：23 / 26

页数：4

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