Application of metal magnetic memory test in failure analysis and safety evaluation of vessels

doi:10.1007/s11465-009-0003-3

Front Mech Eng Chin

2009, Vol. 4

Issue (1) : 40-48 https://doi.org/10.1007/s11465-009-0003-3

RESEARCH ARTICLE

Application of metal magnetic memory test in failure analysis and safety evaluation of vessels

Yiliang ZHANG(

), Song YANG, Xuedong XU

Department of Mechanical Engineering & Applied Electronics Technology, Beijing University of Technology, Beijing 100124, China

Download: PDF(309 KB) HTML
Export: BibTeX | EndNote | Reference Manager | ProCite | RefWorks

Abstract

Metal magnetic memory test (MMMT), which is a new subject in the field of nondestructive examination, can determine regions of stress concentration by testing the distribution of the magnetic field of metal structures so as to effectively diagnose premature defects. MMMT and other test methods are applied in the study to put a propylene purifier of a temperature-jump accident and a leaked ammonia vessel through safety evaluation. Results are as follows: The margin of safety declines after the purifier is overburnt; several stress concentrations are observed within the overburnt area and the level of stress concentration rises after one-month operation; and overpressure operation of the purifier must be strictly avoided and carefully monitored during later operation. Cracks are observed on the ammonia vessel after one year’s service. Extremely high residual stress is the primary cause of cracks. After four years in service, the residual stresses existing in the area of the base metal and weld zone are still greater than 0.5s_S, which results in numerous cracks due to stress corrosion. From the MMMT result of the ammonia vessel’s defects, it can be seen that the derivative of magnetic density (dHp/dx) is an important reference variable. Within the 31 leakage points, 67.7% of them whose dHp/dx values are more than 10, and 96.8% of them whose dHp/dx values are more than 8.

Keywords Metal magnetic memory test (MMMT) nondestructive testing (NDT) residual stress propylene purifier ammonia vessel

Corresponding Author(s): ZHANG Yiliang,Email:zhangyil@bjut.edu.cn

Issue Date: 05 March 2009

Cite this article:

Yiliang ZHANG,Song YANG,Xuedong XU. Application of metal magnetic memory test in failure analysis and safety evaluation of vessels[J]. Front Mech Eng Chin, 2009, 4(1): 40-48.

URL:

https://academic.hep.com.cn/fme/EN/10.1007/s11465-009-0003-3
https://academic.hep.com.cn/fme/EN/Y2009/V4/I1/40

Fig.1 Accident propylene purifier

Fig.2 Leakage ammonia vessel

Tab.1 Brinell figure of gaging points

Fig.3 Strain gauge positions

Tab.2 Stresses at maximum pressure of 3.2 Mpa

Fig.4 First MMMT curves. (a) Before loading; (b) at the load of 3.2 MPa; (c) after loading

Fig.5 Peak spans of MMMT curves (a) MMMT; (b) 2 MMMT

Fig.6 Curve peaks of magnetic densities

Fig.7 Leakage of vessel’s top division

Tab.3 Test result of residual stress (MPa)

Fig.8 Gaging-points position of 2 test

Fig.9 Scanned welding lines

Tab.4 Average of residual stress of gaging points

Tab.5 Average of residual stress of 2 test

Fig.10 MMMT curve of weld 1#

Fig.11 Distribution of magnetic density derivative of weld 1#

1	Lin Junming, Lin Chunjing. A new nondestructive testing technique based on magnetic memory effect. Non-Destructive Testing , 2000, 22(7): 297–299 (in Chinese)
2	Li Luming, Huang Songling, Wang Xiaofeng. Magnetic field abnormality caused by welding residual stress. Journal of Magnetism and Magnetic Materials , 2003, 261(3): 385–391 doi: 10.1016/S0304-8853(02)01488-9
3	Pearson J. Biaxial stress effects on the magnetic properties of pure iron. IEEE Trans Magn . 2000, 36(5): 3251–3253 doi: 10.1109/20.908758
4	Makar J M, Tanner B K. The effect of plastic deformation and residual stress on the permeability and magnetostriction of steels. J Magn Magn Mater , 2000, 222(3): 291–304 doi: 10.1016/S0304-8853(00)00558-8
5	Jiles D C. Theory of the magnetization process in ferromagnets and its application to the magnetomechanical effect. J Phys D: Appl Phys , 1984, 17: 1265–1281 doi: 10.1088/0022-3727/17/6/023
6	Ren Jiling. Metal Magnetic Memory Test. Beijing: China Electricity Press, 2000, 69–78
7	Zhang Ying, Song Kai. Application of ANSYS software in metal magnetic memory testing. Journal of Nanchang Insitute of Aeronautical Technology (Natural Science) , 2004, 18(1): 64–69 (in Chinese)
8	Qian Qilin, Gao Hailiang, Zhang Huihua, Lin Junming. Application of magnetic memory testing to the Marine welded-steel plate. Shipbuilding Technology , 2002, 1: 25–31 (in Chinese) doi: 10.1016/B978-008044100-9/50034-6
9	Ren Jiling, Song Kai, Wu Guanhua, Hu Weili, Jiang Yunsheng, Zhang Zhihong. Application of magnetic memory testing to the inspection of the landing gear of airplane. Nondestructive Testing , 2002, 24(8): 346–351 (in Chinese)
10	Song Kai, Tang Jihong, Zhong Wanli, Liu Weicheng, Ren Jilin. Finite element analysis and magnetic memory testing of ferromagnetism items. Material Engineering , 2004, 4: 40–48 (in Chinese)
11	Chen Ke, Li Honglei, Lei Min, Wang Zhaoxia. Metal Magnetic Memory Testing on the weld of pressure vessel. Pressure Vessel Technology , 2007, 24(8): 13–16 (in Chinese)
12	Dudkiewicz J, Gosowski B. Generalizations of relations between strength and hardness of steel in structural elements under longitudinal load. Archives of Civil Engineering L , 2004, (1): 45–67
13	Li Jianguo. Basic Mechanics and Standards Application of Pressure Vessel Design. Beijing: Machine Building Press, 2005: 46–57
14	Li Xiaoyang, Yuan Jungang, Zhang Yiliang, Liu Hongjuan. Study on relationship between perpendicular magnetic intensity and plastic deformation propagation. Progress in Safety Science and Technology (VOL ) Part B . Beijing: Science Press, 2004: 2944–2948
15	Zhang Yiliang, Xu Xuedong. Analysis of leakage accident of an ammonia tank and its residual stress inspection. Pressure Vessel Technology , 2000, (2): 59–62 (in Chinese)

[1]	Xinyu HUI, Yingjie XU, Weihong ZHANG. Multiscale model of micro curing residual stress evolution in carbon fiber-reinforced thermoset polymer composites[J]. Front. Mech. Eng., 2020, 15(3): 475-483.
[2]	Shuncong ZHONG. Progress in terahertz nondestructive testing: A review[J]. Front. Mech. Eng., 2019, 14(3): 273-281.
[3]	Jinya KATSUYAMA, Shumpei UNO, Tadashi WATANABE, Yinsheng LI. Influence evaluation of loading conditions during pressurized thermal shock transients based on thermal-hydraulics and structural analyses[J]. Front. Mech. Eng., 2018, 13(4): 563-570.
[4]	Xiangyu WANG, Chuanzhen HUANG, Bin ZOU, Guoliang LIU, Hongtao ZHU, Jun WANG. Experimental study of surface integrity and fatigue life in the face milling of Inconel 718[J]. Front. Mech. Eng., 2018, 13(2): 243-250.
[5]	Zhaoxu QI,Bin LI,Liangshan XIONG. The formation mechanism and the influence factor of residual stress in machining[J]. Front. Mech. Eng., 2014, 9(3): 265-269.
[6]	Zhaoxu QI,Bin LI,Liangshan XIONG. Improved analytical model for residual stress prediction in orthogonal cutting[J]. Front. Mech. Eng., 2014, 9(3): 249-256.
[7]	Zhaoxu QI,Bin LI,Liangshan XIONG. An improved algorithm for McDowell’s analytical model of residual stress[J]. Front. Mech. Eng., 2014, 9(2): 150-155.
[8]	Subhash ANURAG, Yuebin GUO, . Predictive model to decouple the contributions of friction and plastic deformation to machined surface temperatures and residual stress patterns in finish dry cutting[J]. Front. Mech. Eng., 2010, 5(3): 247-255.
[9]	LU Jinzhong, ZHANG Yongkang, KONG Dejun, REN Xudong, GE Tao, ZOU Shikun. Effects on mechanical properties in electron beam welding of TC4 alloy by laser shock processing[J]. Front. Mech. Eng., 2007, 2(4): 478-482.
[10]	ZHANG Xiancheng, WU Yixiong, XU Binshi, WANG Haidou. Residual stresses in coating-based systems, part II: Optimal designing methodologies[J]. Front. Mech. Eng., 2007, 2(2): 125-136.
[11]	ZHANG Xiancheng, WU Yixiong, XU Binshi, WANG Haidou. Residual stresses in coating-based systems, part I: Mechanisms and analytical modeling[J]. Front. Mech. Eng., 2007, 2(1): 1-12.

Viewed

Full text

Abstract

Cited

Shared

Discussed