Multiscale investigation of magnetic field distortion on surface of ferromagnetic materials caused by stress concentration for metal magnetic memory method

Qiu, Guotao; Cai, Yongqing; Li, Zongjin

doi:10.1016/j.commatsci.2022.111353

Cited by 8 publications

(7 citation statements)

References 33 publications

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“…At a particular point Q in space, the magnetic field magnitudes HA and HB generated by all the magnetic charge microelements on surfaces A and B can be expressed as Equations ( 8) and ( 9). According to the magnetic field superposition principle, the magnetic induction intensity at point Q can be expressed as Equation (10). The angle between the local coordinate system and the overall coordinate system is denoted as θ. Consequently, B p can be expressed as the vector sum of the two magnetic fields in the x-axis and z-axis directions.…”

Section: Deformation-added Magnetic Fieldmentioning

confidence: 99%

Section: Deformation-added Magnetic Fieldmentioning

confidence: 99%

“…As a result, different degrees of damage, such as protective coating erosion, water penetration, and corrosion or breakage of internal steel wires, can occur in the cable system [ 6 , 7 , 8 , 9 ]. Existing research and engineering practices showed that the performance degradation of a cable often begins with sheath breakage and corrosion of high-strength steel wires [ 10 , 11 ]. Therefore, the research on diagnostic techniques for assessing the service condition of cables was a focal point of attention in both the engineering and academic communities [ 12 ].…”

Section: Introductionmentioning

confidence: 99%

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Experimental Analysis of the Magnetic Leakage Detection of a Corroded Steel Strand Due to Vibration

Zhang

Ding

Yuan

et al. 2023

Sensors

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The self-magnetic flux leakage (SMFL) detection technique has great potential in the corrosion detection of bridge stay cables due to its advantages of small testing equipment, high accuracy, and fast testing rate. However, the vibration effect in the cable’s SMFL detection is unclear. To address this, the influence of vibration on the magnetic field distribution of cable structure is analyzed theoretically. According to the theoretical model, the effect of vibration on SMFL detection primarily manifests as displacement changes (displacement-added magnetic field) and defect shape changes (deformation-added magnetic field). SMFL detection experiments are conducted on steel strands. The results demonstrate that the displacement-added magnetic field exhibits statistical characteristics in the form of a normal distribution, fluctuating around the zero value. The impact of the deformation-added magnetic field on SMFL is linearly correlated with the corrosion ratio c. Moreover, a corrosion characterization index A was proposed and has an excellent linear fit with the corrosion ratio c. The index A effectively improves the accuracy of corrosion detection and provides early warning for the maintenance of cable structures.

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Section: Deformation-added Magnetic Fieldmentioning

confidence: 99%

Section: Deformation-added Magnetic Fieldmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Experimental Analysis of the Magnetic Leakage Detection of a Corroded Steel Strand Due to Vibration

Zhang

Ding

Yuan

et al. 2023

Sensors

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“…Lim et al [28] constructed an FEM model to evaluate the thermal stress of TBC under operating conditions, leading to optimal design criteria for minimizing thermal stress across a wide range of TBC systems. FEM was also conducted to clarify the influence of the martensite transformation in a bond coat on the development of stress in a multilayered system during thermal cycling [29], and the results show that the top ceramic coat stress is greatly influenced by the presence of the martensite transformation. However, the thermophysical properties required for FEM, including thermal conductivity (κ), TECs, heat capacity (c p ), density (ρ), Poisson's ratios (ν), and Young's modulus (E), are derived from experimental measurements, which ignores effects of the phase transition and temperature.…”

Section: Introductionmentioning

confidence: 99%

Capturing and visualizing the phase transition mediated thermal stress of thermal barrier coating materials via a cross-scale integrated computational approach

Gan,

Lu,

et al. 2024

Journal of Advanced Ceramics

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The generation and evaluation of severely high thermal stress (σ) is known to be responsible for failure of thermal barrier coatings (TBCs) during thermal cycling. It is crucial and challenging to capture fluctuations in σ caused by the phase transition, which has motivated us to develop a high-throughput multiscale evaluation method for σ in TBCs that considers the phase transition of the top ceramic materials by coupling first-principles calculations with finite element simulations. The method quantitatively evaluates and visualizes σ of the real TBC structure under thermal cycling by multifield coupling. Additionally, the thermophysical properties calculated by the first-principles calculations consider the effects of temperature and phase transition, which not only reduces the cost of obtaining data but also has a more physical connotation. In this work, rare earth tantalites (RETaO 4 ) are introduced as ceramic layers, and the results demonstrate that σ undergoes a rapid escalation near the phase transition temperature (T t ), particularly in the TBCs_GdTaO 4 system, where it rises from 224 to 435 MPa. This discontinuity in σ may originate from the significant alterations in Young's modulus (increase by 27%-78%) and thermal conductivity (increase by 53%-146%) near T t . The TBCs_NdTaO 4 and TBCs_SmTaO 4 systems exhibit noteworthy temperature drop gradients and minimal σ fluctuations, which are beneficial for extending service lifetime of TBCs. This approach facilitates the prediction of failure mechanisms and provides theoretical guidance for the reverse design of TBC materials to obtain low thermal stress systems.

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“…Metal magnetic memory (MMM) is a new NDT method, used to evaluate the stress concentrations of and fatigue damage to ferromagnetic pipelines [15,16]. Many researchers have conducted a large number of experimental and theoretical studies on the stress-magnetism effect [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

A novel non-contact, magnetic-based stress inspection technology and its application to stress concentration zone diagnosis in pipelines

Liao

Leng

et al. 2023

Meas. Sci. Technol.

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During the construction and long-term operation, stress concentration zones (SCZs) will inevitably occur in buried pipelines. It may cause pipe leakage or fracture failure. Therefore, it is essential to inspect the precise position and stress damage degree of SCZs. Pipeline non-contact magnetic-based stress inspection (PMSI) is an important issue in the oil and gas pipeline stress inspection field. In order to determine the response of the non-contact magnetic gradient signal on stress damage of SCZs, we established a pipeline magnetic-based stress detection model to analyse the three-dimensional magnetic signal of SCZs. The effect of changes to the axial stress value, the stress concentration length, the detection height, and the gradiometer jitter is also studied. Moreover, the PMSI is carried out on a 10.3 km LNG buried pipeline, which is validated by the excavation inspection results. The results indicate that the Gx shows sinusoidal fluctuation near the SCZ. The Gy and Gz reach a peak value. The Gmax increases with the severity and length of SCZs. Two level-II SCZs and two level-III SCZs are found.

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Multiscale investigation of magnetic field distortion on surface of ferromagnetic materials caused by stress concentration for metal magnetic memory method

Cited by 8 publications

References 33 publications

Experimental Analysis of the Magnetic Leakage Detection of a Corroded Steel Strand Due to Vibration

Experimental Analysis of the Magnetic Leakage Detection of a Corroded Steel Strand Due to Vibration

Capturing and visualizing the phase transition mediated thermal stress of thermal barrier coating materials via a cross-scale integrated computational approach

A novel non-contact, magnetic-based stress inspection technology and its application to stress concentration zone diagnosis in pipelines

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