Fatigue damage is the most common kind of failure for metal materials. Traditional non-destructive testing (NDT) methods fail to predict early fatigue damage. Magnetic Metal Memory (MMM) Testing, a new NDT technology, has the potential of fatigue damage evaluation. This paper aims to investigate fatigue mechanical property of ferromagnetic material with the MMM method. Steel Q235 samples with different depth and breadth artificial crack are tested in rotary bending fatigue machinery. The MMM fatigue features are as follows: the tangent component Hp(x) of magnetic induction intensity is gradually increasing up to the peak value while the fatigue crack is initiating and growing; after that peak, Hp(x) is descending with the crack deepening. Furthermore, the features have been studied theoretically.
- Materials Division, Nondestructive Evaluation Division, and Pressure Vessels and Piping Division
Fatigue Property of Steel Q235 Based on Metal Magnetic Memory Testing
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Xing, HY, Zhang, JZ, Zhao, ZB, Xu, MQ, Wang, RX, & Wu, DB. "Fatigue Property of Steel Q235 Based on Metal Magnetic Memory Testing." Proceedings of the ASME 2006 International Mechanical Engineering Congress and Exposition. Materials, Nondestructive Evaluation, and Pressure Vessels and Piping. Chicago, Illinois, USA. November 5–10, 2006. pp. 661-663. ASME. https://doi.org/10.1115/IMECE2006-13457
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