文献类型：期刊文献

英文题名：A novel TMR-based eddy current probe with dual magnetic shielding for evaluating fatigue damage of ferromagnetic materials

作者：Hu, Minghui[1];Liu, Zicheng[1]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Safety, Shanghai 200237, Peoples R China

年份：2025

卷号：253

外文期刊名：MEASUREMENT

收录：;EI(收录号：20252118458580);WOS:【SCI-EXPANDED(收录号:WOS:001612756600014)】；

基金：This work was supported by the National Natural Science Foundation of China, under Grant 52405608.

语种：英文

外文关键词：Eddy current testing; Dual magnetic shielding; Ferromagnetic materials; Fatigue damage; Magnetic domain patterns

摘要：To evaluate early fatigue damage in ferromagnetic materials, a novel TMR-based eddy current (EC) probe with dual magnetic shielding was proposed in this paper. A simulation study is performed to optimize the probe design using a 3D finite element model. The simulation results show that the proposed probe generates magnetic field with EC density of up to 8.92 x 106 A/m(2), which is 3.5 times the induced eddy current density generated by the without magnetic shielding probe (6.50 x 105 A/m(2)). The shielding efficiency and probe sensitivity are verified experimentally by detecting damage in Q345R specimens under different fatigue cycles. The experimental and simulated analysis of magnetic induction field and fatigue life show highly consistent evolution patterns, with Pearson correlation coefficients exceeding 0.95 in all test cases. The magnetic domain structure indicates that altering the spontaneous magnetization direction to enhance the magnetic-elastic properties of Q345R, and led to variations in the eddy current signals on the specimen's surface. The experiments results proved that the developed TMR-based EC probe with dual magnetic shielding can effectively evaluate early damage in ferromagnetic materials.