This paper presents a nondestructive testing of damages on welding lines of pipe using a flexible linearly integrated Giant magnetoresistance (GMR) sensor array (FLGiS). 32 GMR sensor elements were arrayed in a flexible probe at an interval of 1.5 mm. The flexibility of sensor helps to minimize lift-off while scanning the welding lines. The sensor measures residual magnetic density in the welding line to detect the existing of residual stress or damages. Thus, there is no need the supplement of external magnetic field.
(1) Kasban H., Zahran O., Arafa H., El-Kordy M., Elaraby S.M.S., Abd El-Samie F.E., 2011, “Welding defect detection from radiography images with a cepstral approach,” NDT&E International., 44, 226-231.
(2) Zapata J., Vilar R., Ruiz A., 2010, “An adaptive network-based fuzzy inference system for classification of welding defects,” NDT & E International, 43(3), 191–199.
(3) Dennis M., Latiolais C., Thigpen B., “Weld Overlay Examination Using Ultrasonic Phased Array Technology,” 6th International Conference on NDE in Relation to Structural Integrity for Nuclear and Pressurized Components, Oct. 2007, Budapest, Hungary.
(4) Diaz A. A, Crawford S. L., Cinson A. D., Anderson M. T., “An Evaluation of Ultrasonic Phased Array Testing for Reactor Piping System Components Containing Dissimilar Metal Welds,” U.S. Nuclear Regulatory Commission, Technical Letter Report, JCN N6398, Task 2A, Nov. 2009.
(5) Todorov E., Nagy B., Levesque S., Ames N., Na J., 2013, “Inspection of laser welds with array eddy current technique,” AIP Conference Proceeding 1511, 1065, doi: 10.1063/1.4789161.
(6) Mook G., Michel F., Simonin J., “Low frequency eddy current arrays with video clock,” 10th European Conference and Exhibition on Non-destructive Testing, June 7-11, 2010, Moscow, Russia.
(7) Yamamoto T., Takagi T., Uchimoto T., 2010, “Extraction of crack indications from ECT signals using signal phase characteristics of a multi-coil probe,” International Journal of Applied Electromagnetics and Mechanics, 33, 1179-1184.
(8) Le M., Kim J., Yang D., Lee H., Lee J., 2017, “Electromagnetic Testing of a Welding Area Using a Magnetic Sensor Array,” International Journal of Applied Electromagnetics and Mechanics, DOI: 10.3233/JAE-172265
(9) Chen Z., Yusa N., Miya K., Tanahashi A., Sakai K., Chigusa N., 2014, “Advanced MFLT for detecting far side defects in a welding part of an austenitic stainless steel plate,” International Journal of Applied Electromagnetics and Mechanics, 19,527–532
(10) Roskosz, M., 2011, “Metal magnetic memory testing of welded joints of ferritic and austenitic steels,” NDT&E Int., 44, 305-310.
(11) Dubov, A.A, and Kolokolnikov S., 2012, “Assessment of the material state of oil and gas pipelines based on the metal magnetic memory method,” Welding in the World, 56(3), 11-19.
(12) Dubov, A.A, Dubov, A., and Kolokolnikov, S., 2014, “Application of the metal magnetic memory method for detection of defects at the initial stage of their development for prevention of failures of power engineering welded steel structures and steam turbine parts,” Welding in the World, 58(2), 225-236.
55 Page Views
0 PDF Downloads
0 Facebook Shares