This paper focuses on engineering application of metal magnetic memory (MMM) method. High-cycle fatigue test were applied to a large number of defect-free samples, and MMM signals were captured before fatigue fracturing. A concept of critical magnetic intensity (Hp) derivative (dHp/dx) of cracking was proposed. To study the characteristics of Hp and its derivative (dHp/dx) during cracking, fatigue test were applied to a total number of 50 pieces of Q235, 16MnR and base metal and welded specimens. In different fatigue periods, MMM signals were tested and microscopic metallographic were observed, so as to quantitatively analyze Hp and dHp/dx from both macro and micro angles. The results show that various materials differ in their critical dHp/dx limit, which could be the fatigue crack initiation time. It thus proves that MMM has special efficiency in the diagnosis of premature defects and stress concentration of metal structures.
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ASME 2010 Pressure Vessels and Piping Division/K-PVP Conference
July 18–22, 2010
Bellevue, Washington, USA
Conference Sponsors:
- Pressure Vessels and Piping Division
ISBN:
978-0-7918-4924-8
PROCEEDINGS PAPER
Experimental Study on Critical Derivative of Cracking Magnetic Field Intensity in High Frequency Fatigue Test
Yi-liang Zhang,
Yi-liang Zhang
Beijing University of Technology, Beijing, China
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Rui-bin Gou,
Rui-bin Gou
Beijing University of Technology, Beijing, China
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Ji-min Li,
Ji-min Li
Beijing University of Technology, Beijing, China
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Gong-tian Shen,
Gong-tian Shen
China Special Equipment Inspection and Research Institute, Beijing, China
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Jing Wang
Jing Wang
Beijing University of Technology, Beijing, China
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Yi-liang Zhang
Beijing University of Technology, Beijing, China
Rui-bin Gou
Beijing University of Technology, Beijing, China
Ji-min Li
Beijing University of Technology, Beijing, China
Gong-tian Shen
China Special Equipment Inspection and Research Institute, Beijing, China
Jing Wang
Beijing University of Technology, Beijing, China
Paper No:
PVP2010-25531, pp. 233-240; 8 pages
Published Online:
January 10, 2011
Citation
Zhang, Y, Gou, R, Li, J, Shen, G, & Wang, J. "Experimental Study on Critical Derivative of Cracking Magnetic Field Intensity in High Frequency Fatigue Test." Proceedings of the ASME 2010 Pressure Vessels and Piping Division/K-PVP Conference. ASME 2010 Pressure Vessels and Piping Conference: Volume 5. Bellevue, Washington, USA. July 18–22, 2010. pp. 233-240. ASME. https://doi.org/10.1115/PVP2010-25531
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