Application of Magnetic Memory Testing Technology on Pressure Vessel
摘 要
针对磁记忆检测技术在压力容器检验应用过程中存在的信号识别混乱、易误判等问题,分析了在载荷作用下,表面缺陷、埋藏缺陷等不同缺陷类型以及点状、面状和体积型等不同缺陷性质的磁记忆信号产生规律,并且分析了典型缺陷的磁记忆信号特征。结果表明:面状缺陷可以通过磁记忆信号的梯度值、幅值和曲线特征来进行定位和判断,其他类型缺陷的识别度较低。在载荷作用下,磁记忆信号随缺陷扩展端的应力状态而变化;在缺陷扩展期间,磁记忆信号的梯度值和幅值与应力值呈单调递增关系,缺陷扩展端应力释放后,磁记忆信号也随之下降。结合不同检测方法的结果比对,建立了以梯度值、幅值、峰峰值及环境磁场值为参数的磁记忆信号评价方法,明确了磁记忆检测技术在压力容器上的适用范围和检测对象为活性缺陷和应力集中区域的检测。
Abstract
Magnetic memory testing (MMT) technology has been wildly used in metal component on stress concentration and defect detection. In order to resolve the problem that it is difficult to identify the damage MMT signal and the misinformation often appears, the rules of magnetic memory signal of different types (including surface defects and inner defects) and different nature (including punctuate, planar and volumetric defects) while being under different load conditions according to the actual pressure vessel operation have been studied. The characteristics of typical defects magnetic memory signal are analyzed. The results show that the planar defects can be identified and located by the gradient, amplitude and the curvilinear character of magnetic memory signal, whereas the other types of defect is hard to distinguish. The magnetic memory signal changes with the stress situation of the defect extended edge under loads. The gradient and amplitude of magnetic memory signal increase monotonically with increasing stress value during the defect extending and fall after the stress released. Compared with the results of different NDT method, the evaluation method of magnetic memory signal of typical defect is put forward by the appraisal parameters with reference value, and the appraisal parameters including the gradient, amplitude, the peak value and the environmental magnetic field value. The application scope and object of MMT in pressure vessel are defined and limited to inspect the active defects and stress concentration zone.
中图分类号 TG115.28 DOI 10.11973/wsjc201512018
所属栏目 2015远东无损检测新技术论坛论文精选
基金项目 国家自然科学基金资助项目(51377173)
收稿日期 2015/10/30
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备注胡斌(1977-),男,高级工程师。主要从事电磁检测技术的研究工作。
引用该论文: HU Bin,SHEN Gong-tian. Application of Magnetic Memory Testing Technology on Pressure Vessel[J]. Nondestructive Testing, 2015, 37(12): 75~81
胡斌,沈功田. 磁记忆检测技术在压力容器上的应用[J]. 无损检测, 2015, 37(12): 75~81
被引情况:
【1】胡斌,李运涛, "风电塔筒凹陷的磁记忆检测",无损检测 38, 34-36(2016)
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【2】刘一华.应力集中与失效分析[C]∥2006全国兄弟省市理化检测与质量控制学术交流会论文集.安徽:[出版者不详],2006.
【3】WANG P C, CARGILL G S, NOYAN I C, et al. Electromigration-induced stress in aluminum conductor lines measured by X-ray microdiffraction[J]. Applied Physics Letters, 1998,72(11):1296-1298.
【4】NIKITINA N Y, OSTROVSKY L A. An ultrasonic method for measuring stresses in engineering materials[J]. Ultrasonics, 1998,35(8): 605-610.
【5】SABLIK M J, AUGUSTYNIAK B. The effect of mechanical stress on a barkhausen noise signal integrated across a cycle of ramped magnetic field[J]. Journal of Applied Physics, 1996, 79(2):963-972.
【6】YU F, NAGY P B. Dynamic piezoresistivity calibration for eddy current nondestructive residual stress measurements[J]. Journal of Nondestructive Evaluation, 2005,24(4):143-151.
【7】HIRAO M, OGI H, FUKUOKA H. Resonanceemat system for acoustoelastic stress measurement in steel metals[J]. Review of Scientific Instruments, 1993,64(11):3198-3205.
【8】DUBOV A A. Study of metal properties using magnetic memory technique[J]. Metallovedenie i Termicheskaya Obrabotka Metallov, 1997,9:35-39.
【9】仲维畅.金属磁记忆诊断的理论基础-铁磁性材料的弹-塑性应变磁化[J].无损检测, 2001,23(10):424-426.
【10】LI L, HUANG S, WANG X. Stress induced magnetic field abnormality[J]. Transactions of Nonferrous Metals Society of China (English Edition), 2003,13(1):6-9.
【11】黄松岭,李路明,汪来富,等.用金属磁记忆方法检测应力分布[J].无损检测, 2002,24(5):212-214.
【12】李路明,王晓凤,黄松岭.磁记忆现象和地磁场的关系[J].无损检测, 2003,25(8):387-390.
【13】任吉林,邬冠华,宋凯,等.金属磁记忆检测机理的探讨[J].无损检测, 2002,24(1):29-31.
【14】黎连修.磁致伸缩和磁记忆问题研究[J].无损检测, 2004,26(3):109-112.
【15】周俊华,雷银照.正磁致伸缩铁磁材料磁记忆现象的理论探讨[J].郑州大学学报(工学报), 2003,24(3):101-105.
【16】董丽虹,徐滨士,董世运,等.拉伸及疲劳载荷对低碳钢磁记忆信号的影响[J].中国机械工程, 2006,17(7):742-745.
【17】张卫民,董韶平,杨煜,等.磁记忆检测方法及其应用研究[J].北京理工大学学报, 2003,23(3):277-280.
【18】梁志芳,李午申,王迎娜,等.金属磁记忆信号的零点特征[J].天津大学学报, 2006,39(7):847-850.
【19】徐敏强,李建伟,冷建成,等.金属磁记忆技术机理模型[J].哈尔滨工业大学学报, 2010,42(1):16-19.
【20】耿荣生,郑勇.航空无损检测技术发展动态及面临的挑战[J].无损检测, 2002,24(1):1-5.
【21】沈功田,吴彦,王勇.液化石油气储罐焊疤表面裂纹的磁记忆信号研究[J].无损检测, 2004, 26(7):349-351.
【22】刘红文,钟万里,何卫忠,等.金属磁记忆在末级再热器爆管分析中的应用[J].江西电力, 2003,27(4):15-17.
【23】王晓凤.应力集中引起的磁场畸变的初步研究[D]. 北京:清华大学, 2003.
【24】HU Bin, LI Lu-ming, CHEN Xing, et al. Study on the influencing factors of magnetic memory method[J]. International Journal of Applied Electromagnetics and Mechanics, 2010,33(3/4):1351-1357.
【25】ZHONG Li-qiang, LI Lu-ming, CHEN Xing. Magnetic signals of stress concentration detected in different magnetic environment[J]. Nondestructive Testing and Evaluation, 2010,25(2):161-168.
【26】LI Lu-ming, ZHNG Li-qiang, CHEN Xing. Residual stress caused magnetic field abnormal change upon arc welding joints[J]. International Journal of Applied Electromagnetics and Mechanics, 2010,33(3/4):1295-1301.
【27】钟力强,李路明,陈钘.地磁场方向对应力集中引起的磁场畸变的影响[J]. 无损检测, 2009,31(1):1-6.
【28】LI Lu-ming, ZHONG Li-qiang, CHEN Xing. Experiments of influencing factors in the magnetomechanical effect[C]∥ 7th Annual Conference of Japan Society of Maintenology. Hamaoka, Japan:[s.n], 2010.
【29】SHEN Gong-tian, WU Yan, WANG Yong. Investigation on metal magnetic memory signal of surface crack on welding scar in LPG tank[J]. Advances in Nondestructive Evaluation, 2004,270-273:647-650.
【30】HU Bin, LIU Ying-hua, LI Tao-yun. Magnetic field aberration induced by the inner surface crack during loading[C]∥The 17th International Symposium on Applied Electromagnetics and Mechanics (ISEM2015). Japan:[s.n],2015.
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