Results 201 to 210 of about 3,752 (260)
Some of the next articles are maybe not open access.
Magnetic mechanisms of magnetic flux leakage nondestructive testing
Applied Physics Letters, 2013The widely applied magnetic flux leakage (MFL) nondestructive testing for ferrous materials has been simply explained by “MFL escaping from defects and being induced is exactly the MFL testing principle,” with a rough application for evaluation. Hence, we analyze the “escape” course of MFL generation using magnetic refraction and explain the reason why
Yanhua Sun, Yihua Kang, Sun Yanhua
exaly +2 more sources
Research on magnetic inversion in alternating current magnetic flux leakage testing
Insight - Non-Destructive Testing and Condition Monitoring, 2023Defects bring significant security risks to pipelines, which are essential carriers in oil and gas transportation. However, when alternating current magnetic flux leakage (AC-MFL) testing is applied to pipeline defect detection, the morphological reversal of the detection signal under specific parameters has adverse effects on defect identification ...
Gang Wang +4 more
openaire +1 more source
Magnetic charge model of defect in magnetic flux leakage testing
International Journal of Applied Electromagnetics and Mechanics, 2020The defect in structures is the major risk to the structural integrity, thus to perform the defect detections and evaluations efficiently is critical in assuring the structural safety. Magnetic flux leakage testing (MFLT) is an important non-destructive testing (NDT) method.
Huang, Ranran +4 more
openaire +1 more source
Optimisation of the flux distribution in magnetic flux leakage testing
Insight - Non-Destructive Testing and Condition Monitoring, 2009In the magnetic flux leakage (MFL) non-destructive testing technique there are many factors that cause degeneration of the measured signal. One of these factors is non-uniformity of the magnetic flux inside the sample under test. Uniformity of the magnetic flux results in smoother and more predictable signals from various flaw types and also a ...
E Norouzi, H Ravanbod
openaire +1 more source
Deep neural network for simulation of magnetic flux leakage testing
Measurement, 2021Abstract Magnetic flux leakage testing (MFLT) is an important nondestructive testing method for the detection and evaluation of defects in magnetic materials. Magnetic field distribution in an MFLT system is usually simulated by the finite element method (FEM), which required large memory, high computation, and complication of the meshing process. In
Minhhuy Le, Cong-Thuong Pham, Jinyi Lee
openaire +1 more source
Leakage flux modelling in magnetic fluids test bench
2016 IEEE International Conference on Advanced Intelligent Mechatronics (AIM), 2016The proposed paper discusses a new methodology to monitor the B-H curve of magnetic fluids, which have low relative permeability. The set-up consists of a magnetic circuit which encloses a sample. A first coil allows creating a magnetic field into the sample whereas a second one measures the flux density.
Cecile Cuchet +4 more
openaire +1 more source
Study on Simulation and Experiment of the Magnetizer in Magnetic Flux Leakage Testing
2007 International Conference on Mechatronics and Automation, 2007As a type of research tool, the finite element method (FEM) has been widely used in engineering designs and other fields. In this paper, the magnetic circuit character of the magnetizer was studied using the finite element method and related experiments.
Chai Xiuli, Zeng Dechang, Liu Guixiong
openaire +1 more source
2016
As early as 1868, the British Naval Architects Association began to use magnetic flux leakage technology and found defects on the steel pipe through the compass. In 1918, it was found that powder was absorbed near defects due to the changes of surface magnetic field; thus, magnetic particle detection method was invented.
Songling Huang, Shen Wang
openaire +1 more source
As early as 1868, the British Naval Architects Association began to use magnetic flux leakage technology and found defects on the steel pipe through the compass. In 1918, it was found that powder was absorbed near defects due to the changes of surface magnetic field; thus, magnetic particle detection method was invented.
Songling Huang, Shen Wang
openaire +1 more source
Magnetic Flux Leakage Testing for Defect Characterization
2016As a further study on the low-level magnetized magnetic flux leakage testing, numerical simulations and measurements were conducted to investigate the influence of liftoff variation, applicability of the approach to local thinning and material characterization.
Cheng Weiying +2 more
openaire +1 more source