Abstract
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 mm 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.
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References
GAO Y Y, LIN L C. Natural frequency of component under influence of welding residual stress[J]. Trans Nonferrous Met Soc China, 1996, 6(1): 135–140.
DING X D, LIAN J S, JIANG Z H, et al. Thermal residual stresses and stress distributions under tensile and compressive loadings of short fiber reinforced metal matrix composites[J]. Trans Nonferrous Met Soc China, 2001, 11(3): 399–404.
YUAN Fa-rong, WU Shang-li. Measurement and Calculation of Residual Stress[M]. Changsha: Hunan University Press, 1987. (in Chinese)
Dali J W, Laili W F. Experiment and Analysis of Residual Stress[M]. Beijing: Ocean Press, 1987. (in Chinese)
Masatoshi K. Evaluation of residual stresses and plastic deformation for iron-based materials by leakage magnetic flux sensors[J]. J Alloys and Compounds, 2001, 314: 232–239.
Bi Y, Jiles D C. Dependence of magnetic properties on crack size in steels[J]. IEEE Trans Magn, 1998, 34(4): 2021–2023.
Doubov A A. Diagnostics of metal and equipment by means of metal magnetic memory [A]. Proceedings of Chinese Nondestructive Testing, 7th Conference on NDT and International Research Symposium [C]. Shantou, China, Oct. 1999.
REN Ji-lin, WU Guan-hua, SONG Kai, et al. Study on the mechanism of metal magnetic memory testing [J]. Chinese J of NDT, 2002, 24(1): 29–31. (in Chinese)
GENG Rong-sheng. Magnetic memory inspection: its application to the detection of early damages of aircraft main structures[J]. Chinese J of NDT, 2002, 24(3): 118–122. (in Chinese)
LIN Jun-ming. 21st century-oriented nondestructive testing technology[J]. North China Electric Power, 2000, (9): 44–45. (in Chinese)
LI Lu-ming, HUANG Song-ling, WANG Lai-fu, et al. Research on magnetic testing method of stress distribution[J]. Trans Nonferrous Met Soc China, 2002,12(3): 388–391.
LI Lu-ming, HUANG Song-ling, WANG Xiao-feng, et al. A study of stress induced magnetic field abnormality[J]. Trans Nonferrous Met Soc China, 2003, 13(1): 6–9.
LI An-ding. Stress Concentration[M]. Mechanical Industry Press, 1986. (in Chinese)
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Foundation item: Project(50001006 and 50305017) supported by the National Natural Science Foundation of China and Project (ZBJ2002-17) supported by the China Postdoctoral Science Foundation
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Huang, Sl., Li, Lm., Shi, Kr. et al. Magnetic field properties caused by stress concentration. J Cent. South Univ. Technol. 11, 23–26 (2004). https://doi.org/10.1007/s11771-004-0005-6
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DOI: https://doi.org/10.1007/s11771-004-0005-6