Characterization of reversible permeability in advanced USC steel during thermal aging

Kim, Chung Seok

doi:10.1002/pssa.200925071

Cited by 8 publications

(3 citation statements)

References 20 publications

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“…The MBN signal, generated by the irreversible motion of the magnetic domain walls, could be used to describe the microstructure and the stress state of the ferromagnetic material [ 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 ]. Correspondingly, the MIP signal, generated by the reversible motion of the domain walls, could be also used to describe the microstructure and the stress state of the ferromagnetic material [ 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 ].…”

Section: Methodsmentioning

confidence: 99%

Stress and Microstructures Characterization Based on Magnetic Incremental Permeability and Magnetic Barkhausen Noise Techniques

Sheng,

Wang,

Yang

et al. 2024

Materials

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Both microstructure and stress affect the structure and kinematic properties of magnetic domains. In fact, microstructural and stress variations often coexist. However, the coupling of microstructure and stress on magnetic domains is seldom considered in the evaluation of microstructural characteristics. In this investigation, Magnetic incremental permeability (MIP) and magnetic Barkhausen noise (MBN) techniques are used to study the coupling effect of characteristic microstructure and stress on the reversible and irreversible motions of magnetic domains, and the quantitative relationship between microstructure and magnetic domain characteristics is established. Considering the coupling effect of microstructure and stress on magnetic domains, a patterned characterization method of microstructure and stress is innovatively proposed. Pattern recognition based on the Multi-layer Perceptron (MLP) model is realized for microstructure and stress with an accuracy rate higher than 97%. The results show that the pattern recognition accuracy of magnetic domain features and micro-magnetic features simultaneously as input parameters is higher than that of micro-magnetic features alone as input parameters.

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Section: Methodsmentioning

confidence: 99%

Stress and Microstructures Characterization Based on Magnetic Incremental Permeability and Magnetic Barkhausen Noise Techniques

Sheng,

Wang,

Yang

et al. 2024

Materials

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“…This strain-induced martensite is in the ferromagnetic phase. The magnetic properties of materials are very sensitive to microstructural changes in the materials, and indeed, magnetic methods have been used to estimate microstructural changes affecting phase transformation, crystalline grains, and particle size that occur in various steels [11][12][13]. The use of nonlinear ultrasonic methods can also promote an understanding of the evolution and accumulation of the plastic deformation of materials occurring in the very early stages of fatigue [14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Nondestructive Evaluation of Strain-Induced Phase Transformation and Damage Accumulation in Austenitic Stainless Steel Subjected to Cyclic Loading

Kim

2017

Metals

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Strain-induced phase transformation and damage accumulation in austenitic stainless steel subjected to cyclic loading were investigated by nondestructive evaluation. The cyclic loading test was performed at various strain amplitudes at the same strain rate. The volume fraction of the strain-induced phase transformation (α -martensite) was determined by ferrite scope and magnetic coercivity measurement. The damage accumulation and microstructure of cyclic loading specimens were characterized by microstructural observation. The cyclic hardening and cyclic softening behavior are discussed in terms of the generation of strain-induced martensite phases and a dislocation substructure at each strain amplitude. The volume fraction of the strain-induced phase increased with the strain amplitude. The increase in α -martensite was evaluated by measuring the ultrasonic nonlinearity parameter. The presence of α -martensite is sufficient to distort the austenitic matrix due to an interface misfit between the austenite matrix and α -martensite, resulting in wave distortion of the longitudinal wave. From this wave distortion, super-harmonics may be generated with nucleation of the strain-induced martensite, a process that strongly depends on the strain amplitude.

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“…The matrix is softened by microstructural changes and solute depletion produces severe degradation of the mechanical properties of steel exposed to high temperatures for extended periods of time [1,2]. The life of 1Cr-0.5Mo steel used for pressure vessels, such as the tubes for heat exchangers and the petroleum refinery, should be reduced by degradation.…”

Section: Introductionmentioning

confidence: 99%

Nondestructive Evaluation for Remanent Life of 1Cr-0.5Mo Steel by Reversible Permeability

Ryu¹,

Lee²,

Park³

et al. 2012

Journal of Magnetics

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Peak interval for reversible permeability is presented for nondestructively evaluating the remanent life of 1Cr-0.5Mo steel. The method to measure the peak interval of reversible permeability is based on the value of reversible permeability is the same as the differential value of the hysteresis loop. The measurement principle is based on the first harmonics voltage induced in a sensing coil using a lock-in amplifier tuned to a frequency of the exciting voltage. Results obtained for the peak interval of reversible permeability and Rockwell hardness on the aged samples decrease as aging time and the Larson-Miller parameter increase. We could estimate the remanent life of 1Cr-0.5Mo steel by using the relationship between the peak interval of reversible permeability and the Larson-Miller parameter, nondestructively.Keywords : remanent life, 1Cr-0.5Mo steel, nondestructive evaluation (NDE), peak interval of reversible permeability (PIRP), Larson-Miller parameter (LMP)

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Characterization of reversible permeability in advanced USC steel during thermal aging

Cited by 8 publications

References 20 publications

Stress and Microstructures Characterization Based on Magnetic Incremental Permeability and Magnetic Barkhausen Noise Techniques

Stress and Microstructures Characterization Based on Magnetic Incremental Permeability and Magnetic Barkhausen Noise Techniques

Nondestructive Evaluation of Strain-Induced Phase Transformation and Damage Accumulation in Austenitic Stainless Steel Subjected to Cyclic Loading

Nondestructive Evaluation for Remanent Life of 1Cr-0.5Mo Steel by Reversible Permeability

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