Mechanism of formation of aligned two-phase microstructure in a Fe-0.25wt%C alloy under high magnetic field gradients

Wang, Kai; Wang, Qiang; Wang, Chun‐Jiang; Yuan, Yong; Liu, Chunming; He, Jicheng

doi:10.1080/09500830903258172

Cited by 6 publications

(3 citation statements)

References 14 publications

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“…It does not exactly determine which mechanism is responsible for evolution of the surface morphology, but it may be attributed to two factors. One is the coalescence of the grains with similar starting orientation induced by the polarized effect [20,21] of a moderate magnetic field (6 T). The magnetic moment in these ferrite grains induced by the applied uniform magnetic field results in the grains attracting each other.…”

Section: Resultsmentioning

confidence: 99%

Effects of High Magnetic Field Postannealing on Microstructure and Properties of Pulse Electrodeposited Co-Ni-P Films

Wang

et al. 2016

Advances in Materials Science and Engineering

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The influence of high magnetic field annealing on the morphology, microstructure, and properties of pulsed-electrodeposited Co-Ni-P films was investigated. The as-deposited film with a rough surface changed into uniform nanocrystalline during the magnetic field annealing process. In particular, the formation of intestine-like appearance with spherical clusters vanishing is favored from a moderate magnetic field strength of 6 T, due to the polarized effects. Meantime, the diffraction peak (111) of α (fcc) phase shifts to the right direction, which is attributed to the fact that more Co atoms from phosphide phase are incorporated into the Ni lattice, in comparison with the case of annealing under 0 T and 12 T magnetic fields. The mechanical and magnetic properties of the films reach relative optimum values at B=6 T. The evolution of magneto-induced modification in the Co-Ni-P morphology, structure, and properties can be explained by the polarized effect and the diffusion-acceleration effect under a high magnetic field.

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Section: Resultsmentioning

confidence: 99%

Effects of High Magnetic Field Postannealing on Microstructure and Properties of Pulse Electrodeposited Co-Ni-P Films

Wang

et al. 2016

Advances in Materials Science and Engineering

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“…Moreover, accurate characterization of fields uniformity is essential for the optimization of velocity field [9,10,11], electric fields [12,13], magnetic fields [14,15], etc.. A large number of mathematical works have been devoted to studying this issue. In practice, characterizing the mixing distribution of these flow patterns quantitatively using image processing technology, which has been effectively used for feature extraction in medical, bioengineering [16], pharmaceutics [17] and chemical industries, has drawn considerable interest in recent years.…”

Section: Introductionmentioning

confidence: 99%

Measure of bubble non-uniformity within circular region in a direct-contact heat exchanger

Xiao

Pan

et al. 2017

International Journal of Heat and Mass Transfer

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The study of bubble swarm distributions in a direct-contact heat exchanger was addressed both theoretically and experimentally. But recently developed approach based on uniform design for measuring bubbles uniformity and mixing efficiency within rectangular or square region can not be used to characterise the mixture homogeneity and mixing time within circular region. This paper discussed the difference between rectangular or square region and circular region. A quantitative metric of mixing uniformity is used to characterize the bubble patterns within circular region. Simulation studies are also used to illustrate the proposed methodologies while the experimental case considered demonstrate that the proposed approach evaluated the experimental data rather well. The space-time features of the mixing transient have been successfully derived when the bubble swarms or other objects distribute in a circular region. This work brings new insights to evaluate mixing quality of different systems practically, which has a high degree of accuracy (the percentage of enhancing achieved is about 40%).

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“…The application of a high magnetic field to material processing has become highly developed during the past two decades owing to the development of superconducting materials and cryogenic technology. [1][2][3] Many novel effects of magnetic field on the convection, 4) diffusion, 5) solid-state phase transformation, 6,7) and solidification process [8][9][10] have been observed. Recently, a number of investigations have been devoted to the nonequilibrium solidification of undercooled alloys under high magnetic fields.…”

Section: Introductionmentioning

confidence: 99%

Reexaminations of the effects of magnetic field on the nucleation of undercooled Cu melt

Wang

et al. 2016

Jpn. J. Appl. Phys.

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The effect of a high static magnetic field on the nucleation of an undercooled Cu melt has been investigated using a glass slag fluxing technique in a 12 T superconductor magnet. Controlled heating cycles with and without a magnetic field are performed and the results indicate that the magnetic field has no single effect on the mean undercooling of undercooled Cu liquid, which is different from previous reports. The high static magnetic field can enhance the undercooling of Cu at first, and the effect is weakened with increasing number of heating cycles. The undercooling of undercooled Cu is saturated at around 250 K regardless of the magnetic field after a certain number of heating cycles. The effects are interpreted on the basis of the thermodynamic and magnetohydrodynamic effects of the magnetic field on the undercooled melt and the heterogeneous nucleation theory.

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Mechanism of formation of aligned two-phase microstructure in a Fe-0.25wt%C alloy under high magnetic field gradients

Cited by 6 publications

References 14 publications

Effects of High Magnetic Field Postannealing on Microstructure and Properties of Pulse Electrodeposited Co-Ni-P Films

Effects of High Magnetic Field Postannealing on Microstructure and Properties of Pulse Electrodeposited Co-Ni-P Films

Measure of bubble non-uniformity within circular region in a direct-contact heat exchanger

Reexaminations of the effects of magnetic field on the nucleation of undercooled Cu melt

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