Theoretical investigation of metal magnetic memory testing technique for detection of magnetic flux leakage signals from buried defect

2017 ◽  
Vol 33 (1) ◽  
pp. 45-55 ◽  
Author(s):  
Kunshan Xu ◽  
Xingqi Qiu ◽  
Xiaoshuai Tian
Keyword(s):  
Magnetic Flux ◽  
Theoretical Investigation ◽  
Magnetic Flux Leakage ◽  
Magnetic Memory ◽  
Memory Testing ◽  
Metal Magnetic Memory ◽  
Testing Technique ◽  
Metal Magnetic Memory Testing ◽  
Flux Leakage

Numerical Simulation Study of Stress-Magnetization Effect on Different Notch Steel Specimens

2014 ◽  
Vol 989-994 ◽  
pp. 891-897 ◽  
Author(s):  
Xiao Wen Xi ◽  
Shang Kun Ren ◽  
Yin Huang
Keyword(s):  
Magnetic Flux ◽  
Quantitative Research ◽  
Tensile Load ◽  
Magnetic Flux Leakage ◽  
Magnetic Memory ◽  
Metal Magnetic Memory ◽  
Element Analysis ◽  
Damage Degree ◽  
Testing Technology ◽  
Flux Leakage

To study the mechanism of metal magnetic memory (MMM) testing technology, the stress-magnetization effect on 20 steel specimens with different notch angles under exercise of the geomagnetic field and tensile load is simulated by using the finite element analysis (FEA) software ANSYS. With the stimulation, the stress and magnetic flux leakage distribution of the specimens is given. The results showed that internal stress distribution of different notch specimens under external tensile effects is different; The curves of relationship between damage degree of stress concentration and the distribution of magnetic flux leakage is also related to the defect shape and structure; Magnetization decreases with increases of stress at first and then increases with continuing increase of stress, which is called stress magnetization reversal. It provides an important reference for the quantitative research of metal magnetic memory technology.

Theoretical studies of metal magnetic memory technique on magnetic flux leakage signals

2010 ◽  
Vol 43 (4) ◽  
pp. 354-359 ◽  
Author(s):  
Z.D. Wang ◽  
K. Yao ◽  
B. Deng ◽  
K.Q. Ding
Keyword(s):  
Magnetic Flux ◽  
Magnetic Flux Leakage ◽  
Magnetic Memory ◽  
Theoretical Studies ◽  
Metal Magnetic Memory ◽  
Flux Leakage

Metal Magnetic Memory Testing of Welded Joints under Fatigue Load

2017 ◽  
Vol 898 ◽  
pp. 1069-1078
Author(s):  
Ning Qiao ◽  
Mu Xiao Shan ◽  
Ye Zheng Li
Keyword(s):  
Stress Concentration ◽  
Magnetic Flux ◽  
Crack Propagation ◽  
Normal Component ◽  
Fatigue Loading ◽  
Fracture Morphology ◽  
Magnetic Flux Leakage ◽  
Magnetic Memory ◽  
Metal Magnetic Memory ◽  
Flux Leakage

To investigate the influence of stress concentration, crack propagation and types of fatigue loading on metal magnetic memory signals, two groups of fatigue experiments with different types of fatigue loading were carried out on Q235B steel welded joint. The normal components of magnetic flux leakage were measured by metal magnetic memory tester in the course of fatigue test, and the fracture surfaces of specimens were observed by scanning electron microscopy after fatigue tests. The experimental results showed that the normal components of magnetic flux leakage filed, as well as the metal magnetic memory signal, changed polarity and their gradients have peak values at stress concentration zones. The zero position of the normal component of magnetic flux leakage changed gradually with increasing cycle numbers. In addition, the metal magnetic memory signal feature of fatigue crack propagation was affected by the loading type clearly. Moreover, a combination of brittle rupture and ductile rupture was obtained in the fracture morphology figure.

Investigation of Array Magnetic Memory Testing Technology on Extension of Metal Crack

2011 ◽  
Vol 148-149 ◽  
pp. 1483-1486
Author(s):  
Wei Min Zhang ◽  
Cheng Feng Chen ◽  
Hao Yan Li ◽  
Shu Xuan Liu
Keyword(s):  
Crack Extension ◽  
Complex Shape ◽  
Magnetic Memory ◽  
Memory Testing ◽  
Metal Magnetic Memory ◽  
Testing Technique ◽  
Testing Method ◽  
Testing Technology ◽  
Core Components ◽  
Metal Magnetic Memory Testing

Metal Magnetic Memory (MMM) testing method has its own effective and unique advantages on the research of extension of metal crack. The array magnetic memory testing sensor designed and assembled in accordance with specific conditions, could evidently enhance testing-efficiency, such as for components with complex shape or large surface area, and may simplify the test equipment correspondingly. A kind of array magnetic memory sensor with Hall elements as core components was designed and an experiment on metal magnetic memory testing on extension of metal crack was executed. The experiment results indicate that the magnetic memory testing technique could effectively monitor and qualitatively evaluate the progress of metal crack extension.

scholarly journals Stress measurement using magnetic Barkhausen noise and metal magnetic memory testing

2010 ◽  
Vol 21 (5) ◽  
pp. 055703 ◽  
Author(s):  
Ping Wang ◽  
Shougao Zhu ◽  
Gui Yun Tian ◽  
Haitao Wang ◽  
John Wilson ◽  
...  
Keyword(s):  
Stress Measurement ◽  
Barkhausen Noise ◽  
Magnetic Memory ◽  
Memory Testing ◽  
Metal Magnetic Memory ◽  
Magnetic Barkhausen Noise ◽  
Metal Magnetic Memory Testing

Useable Research on Metal Magnetic Memory Testing in Steel Casting Inspection

2014 ◽  
Author(s):  
Wan Shengyun ◽  
Lu Donglei ◽  
Zheng Xiaokang ◽  
Liu Shiyuan ◽  
Zhang Wenxian ◽  
...  
Keyword(s):  
Steel Casting ◽  
Magnetic Memory ◽  
Memory Testing ◽  
Metal Magnetic Memory ◽  
Metal Magnetic Memory Testing

Magnetic crawler climbing detection robot basing on metal magnetic memory testing technology

2020 ◽  
Vol 125 ◽  
pp. 103439 ◽  
Author(s):  
Fumin Gao ◽  
JianChun Fan ◽  
Laibin Zhang ◽  
Jiankang Jiang ◽  
Shoujie He
Keyword(s):  
Magnetic Memory ◽  
Memory Testing ◽  
Metal Magnetic Memory ◽  
Testing Technology ◽  
Metal Magnetic Memory Testing

scholarly journals Characteristics of Metal Magnetic Memory Testing of 35CrMo Steel during Fatigue Loading

Metals ◽  
2018 ◽  
Vol 8 (2) ◽  
pp. 119 ◽  
Author(s):  
Zhibin Hu ◽  
Jianchun Fan ◽  
Shengnan Wu ◽  
Haoyuan Dai ◽  
Shujie Liu
Keyword(s):  
Fatigue Loading ◽  
Magnetic Memory ◽  
Memory Testing ◽  
Metal Magnetic Memory ◽  
35Crmo Steel ◽  
Metal Magnetic Memory Testing

Characterisation of stress concentration of ferromagnetic materials by metal magnetic memory testing

2010 ◽  
Vol 25 (2) ◽  
pp. 145-151 ◽  
Author(s):  
Lihong Dong ◽  
Binshi Xu ◽  
Shiyun Dong ◽  
Qunzhi Chen
Keyword(s):  
Stress Concentration ◽  
Ferromagnetic Materials ◽  
Magnetic Memory ◽  
Memory Testing ◽  
Metal Magnetic Memory ◽  
Metal Magnetic Memory Testing
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