弱磁激励下Q235钢的磁记忆检测
Magnetic Memory Testing of Q235 Steel under Weak Magnetic Field
摘 要
在不同弱磁场环境下对Q235钢平板试件进行静拉伸试验,利用TSC-1M-4磁检测仪原位测量试件表面的法向磁场,并分析磁场在拉伸过程中的变化规律。结果表明:强化弱磁激励可以减小干扰噪声的不利影响,改善检测效果。弱磁激励下,试件在弹性阶段出现应力磁化反转现象;塑性阶段保持磁化反转,磁场越过零点后沿反方向增大。并且,探讨了试件在弱磁激励下磁场梯度K与应力之间的相关性,为磁检测技术在铁磁材料损伤评估中的应用奠定了基础。
弱磁激励
力-磁效应
应力磁化反转
Metal magnetic memory
Weak magnetic excitation
Stress-magnetic effect
Stress-induced magnetization reversal
Abstract
The static tensile test of Q235 steel sample was carried out in different magnetic field environment, the normal magnetic field of the surface of the sample under stress concentration was collected up in-situ by the TSC-1M-4 tester and variation of the magnetic field in static tensile was analyzed. The result showed that, noise interference could be reduced effectively by applying an external magnetic field, thus improving the detection result. Stress-induced magnetization reversal phenomenon occurred in elastic stage, and kept the reversal in the plastic stage, then the magnetic field crossed zero and increased in the opposite direction. The correlation between magnetic gradient K and stress in the external magnetic field environment was discussed.
中图分类号 TG115.28
所属栏目 科研成果与学术交流
基金项目 国家自然科学基金资助项目(51275048)
收稿日期 2014/2/12
修改稿日期
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备注邱忠超(1987-),男,博士研究生,主要研究方向为电磁无损检测。
引用该论文: QIU Zhong-chao,ZHANG Wei-min,GUO Yan,YU Xia. Magnetic Memory Testing of Q235 Steel under Weak Magnetic Field[J]. Nondestructive Testing, 2014, 36(11): 6～10
邱忠超,张卫民,果艳,于霞. 弱磁激励下Q235钢的磁记忆检测[J]. 无损检测, 2014, 36(11): 6～10
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参考文献
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【3】LENG Jian-cheng, XU Min-qiang, ZHANG Jia-zhong. Application of empirical mode decomposition in early diagnosis of magnetic memory signal. Journal of Central South University of Technology, 2007,14(3):319-323.
【4】兵器工业无损检测人员技术资格鉴定考核委员会. 常用钢材磁特性曲线速查手册[M]. 北京:机械工业出版社,2003.
【5】袁俊杰. 承载铁磁性构件的磁记忆检测技术研究[D]. 北京:北京理工大学,2007.
【6】GUO Peng-ju, CHEN Xue-dong, GUAN Wei-he, et al.Effect of tensile stress on the variation of magnetic field of low-alloy steel [J]. Journal of Magnetism and Magnetic Materials, 2011, 323:2474-2477.
【7】JILES D C. Theory of the magnetomechanical effect [J]. Journal of Physics D-Applied Physics, 1995, 28(8):1537-1546.
【8】LINDGREN M, LEPIST T. Effect of prestraining on Barkhausen noise vs. stress relation [J]. NDT&E International, 2001,34:337-344.
【9】李一,任尚坤. 铁磁试件静载拉伸时应力磁化的反转效应[J]. 钢铁研究学报,2013,25(3):30-33.
【10】徐章遂,徐英,王建斌. 裂纹漏磁定量检测原理与应用[M]. 北京:国防工业出版社,2005.
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