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Transactions of the Indian Institute of Metals

, Volume 72, Issue 2, pp 343–351 | Cite as

Distinguishing Welding Defects from the Stress Concentration Zone Using Metal Magnetic Memory Field Parameters

  • Xu KunshanEmail author
  • Mingguang Feng
  • Xingxi Qiu
Technical Paper
  • 34 Downloads

Abstract

In this study, we propose a technique for differentiating MMMT signals from the welding defects and stress concentration zones by evaluating changes in the intensity of the magnetic memory signal and gradient of its change. The results demonstrate that the average and maximum values of the magnetic field intensity gradient vary relative to the presence of a welding defect zone; this gradient can be seen as the area under the magnetic field intensity curves. These parameters can be considered as a basis for distinguishing welding defects from the stress concentration zone. Finally, we present diagnosis and damage determinations of various welding defects and stress concentrations and propose a connection to magnetic and non-magnetic defects. The technique presented here can be potentially used to enhance the MMMT application for better diagnosis and understanding of welded joints and failure mechanisms.

Keywords

Welding defect Stress concentration Metal magnetic memory Defect evaluation Microcracks Ferromagnetic defect interfaces 

Notes

Acknowledgements

This work was financially supported by the National High Technology Research and Development Program 863 of the People’s Republic of China under Grant (No. 2013AA092602), Shandong Provincial Key Laboratory, Shandong Light Hydrocarbon Collaborative Innovation Center, Shandong Provincial Key Laboratory (specialized in the manufacture of new materials), and Shandong Provincial Science and Technology Plan Project (Grant No. J18KB007) of the People’s Republic of China.

Compliance with ethical standards

Conflict of interest

We declare that we have no financial and personal relationships with other people or organizations that can inappropriately influence our work and there is no professional or other personal interest of any nature or kind in any product, service and/or company that could be construed as influencing the position presented in the manuscript entitled ‘Distinguishing welding defects from the stress concentration zone using metal magnetic memory field parameters’.

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Copyright information

© The Indian Institute of Metals - IIM 2018

Authors and Affiliations

  1. 1.College of Chemistry and Chemical EngineeringYantai UniversityYantaiChina
  2. 2.Yantai Special Equipment Inspection InstituteYantaiChina
  3. 3.School of Chemical EngineeringChina University of Petroleum (East China)QingdaoChina

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