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Comparison of Repeatability and Stability of Residual Magnetic Field for Stress Characterization in Elastic and Plastic Ranges of Silicon Steels

Lookup NU author(s): Professor Gui Yun TianORCiD, Professor Bin Gao



This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).


© 2022 by the authors. Licensee MDPI, Basel, Switzerland. Deep insights into microstructures and domain wall behaviors in the evaluation of different material statuses under elastic and plastic stress ranges have essential implications for magnetic sensing and nondestructive testing and evaluation (NDT&E). This paper investigates the repeatability and stability of residual magnetic field (RMF) signals using a magneto-optical Kerr effect microscope for the stress characterization of silicon steel sheets beyond their elastic limit. Real-time domain motion is used for RMF characterization, while both the repeatability under plastic ranges after the cyclic stress rounds and stability during relaxation time are studied in detail. The distinction between elastic and plastic materials is discussed in terms of their spatio-temporal properties for further residual stress measurement since both ranges are mixed. During the relaxation time, the RMF of the plastic material shows a two-stage change with apparent recovery, which is contrasted with the one-stage change in the elastic material. Results show that the grain boundary affects the temporal recovery of the RMF. These findings concerning the spatio-temporal properties of different RMFs in plastic and elastic materials can be applied to the design and development of magnetic NDT&E for (residual) stress measurement and material status estimation.

Publication metadata

Author(s): Zeng K, Tian G, Gao B, Liu J, Liu Y, Liu Q

Publication type: Article

Publication status: Published

Journal: Sensors

Year: 2022

Volume: 22

Issue: 8

Online publication date: 15/04/2022

Acceptance date: 13/04/2022

Date deposited: 28/04/2022

ISSN (electronic): 1424-8220

Publisher: MDPI


DOI: 10.3390/s22083052


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