Effect of rotating magnetic field on the microstructure and properties of Cu–Ag–Zr alloy

Li, Hang; Jie, Jinchuan; Chen, Hang; Zhang, Pengchao; Wang, Tongmin; Li, Tingju

doi:10.1016/j.msea.2014.11.064

Cited by 19 publications

(6 citation statements)

References 28 publications

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“…For instance, the primary arm spacing λ1 significantly decreases, whereas the secondary arm spacing λ2 increases during the solidification of the A357 alloy under the action of RMF, as reported by Steinbach and Ratke [33]. Finally, the RMF by its action on dendrite fragments and new nucleated grains can trigger or improve the CET [8,24,32,34,35].…”

Section: Introductionsupporting

confidence: 52%

Modification of the microstructure by rotating magnetic field during the solidification of Al-7 wt.% Si alloy under microgravity

Mangelinck‐Noël

Zimmermann

et al. 2020

Journal of Alloys and Compounds

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Directional solidifications of Al-7 wt.% Si alloy were carried out under microgravity on board the International Space Station to investigate the impact of a rotating magnetic field (RMF) on the solidified microstructure. It has been found that the RMF significantly influences the solidified microstructure in the conditions corresponding to the lowest growth rate, whereas it has negligible influence on the microstructure under the highest growth rate, indicating that the RMF intensity and the forced liquid flow are too weak, compared to the solidification front velocity, to impact the microstructure. For the lowest growth rate applied, the RMF application results in a more uniform eutectic phase distribution and a smaller dendrite arm spacing. This is ascribed to the RMF induced forced liquid flow that makes more uniform Si concentration in the bulk liquid above the solid-liquid interface. Additionally, the RMF application possibly modifies the columnar dendritic network by changing dendrite growth directions. This observation can be attributed to the combined effect of the RMF induced forced liquid flow and of the thermoelectric magnetic force on the dendrites resulting from the application of the RMF as well.

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Section: Introductionsupporting

confidence: 52%

Modification of the microstructure by rotating magnetic field during the solidification of Al-7 wt.% Si alloy under microgravity

Mangelinck‐Noël

Zimmermann

et al. 2020

Journal of Alloys and Compounds

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“…Fragmentation of the dendrite, and heterogeneous nucleation are the probable causes for the promotion of the columnar-equiaxed transition. EMS has been reported to promote equiaxed grain and reduce the average grain size in alloys such as various steels [ 9 , 10 , 11 ], super alloys [ 12 , 13 ], copper alloys [ 14 , 15 ], magnesium alloys [ 16 , 17 ], and aluminum alloys [ 18 , 19 , 20 ]. Microstructure refinement is helpful to improve the mechanical properties and characteristics of the metal alloys.…”

Section: Introductionmentioning

confidence: 99%

Effect of Electromagnetic Stirring on the Microstructure and Properties of Fe-Cr-Co Steel

et al. 2018

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High chromium steel has been synthesized by an induction furnace adopting electromagnetic stirring (EMS). Varying amounts of cobalt was added to obtain 3, 6, and 12% Co in the steel. The melt was allowed to solidify with or without EMS in a rotary magnetic field. The effects of the varying cobalt content and the stirring have been characterized by the microstructural evolution and the consequent improvement in mechanical properties. The application of a rotary EMS during solidification has shown a significant effect on the grain refining, the reduction of element segregation, the promotion of eutectic volume fraction, and the consequent improvement of mechanical properties, including hardness and high-temperature strength. The formation mechanism of the eutectic structure and the precipitation of M7C3 and M23C6 carbides was discussed according to the calculated phase diagram. The increment of cobalt content improved the eutectic volume fraction. Cobalt addition also enhanced the hardness and the yield tensile strength, provided that the ingot structure was homogenized by the EMS.

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“…As mentioned before, the forced melt flow due to the RMF directly affects the solidified microstructure (primary and secondary dendrite arm spacing, micro and macro segregation, grain structure, columnar/equiaxed transition) [14][15][16][17][18][19][20][21][22][23][24][25][26][27] . Suppose the angular velocity is higher, the effect also higher.…”

mentioning

confidence: 99%

“…In that case, a TEFLON crucible was used during the experiments, the wall of the crucible was assumed to be sufficiently smooth (the wall roughness was negligible), and there was no friction between the wall and melt (Samples 1 -8 in Table 1). Many different crucible materials were used in the solidification experiments to study the effect of magnetic stirring on the solidified microstructure, e.g., aerogel 15 , graphite [16][17][18] , Al 2 O 3 [19][20][21][22][23] , silica 24 , stainless steel 25,26 , gypsum 27 . The wall roughness of these crucibles was very different and was higher than that of TEFLON.…”

mentioning

confidence: 99%

“…The wall friction increased with an increase in wall roughness, and the angular velocity at a given magnetic induction (B) decreased. Therefore, Bcr was higher in the materials used in the solidification experiments [15][16][17][18][19][20][21][22][23][24][25][26][27] . The comparability of the different experiments requires knowledge of the effect of wall friction on the melt flow.…”

mentioning

confidence: 99%

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Effect of crucible wall roughness on the laminar/turbulent flow transition of the Ga75In25 alloy stirred by a rotating magnetic field

Roósz

Rónaföldi

Svéda

et al. 2022

Sci Rep

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The critical magnetic induction (Bcr) values of a melt flow produced by a rotating magnetic field (RMF), remaining laminar or turbulent, are essential in different solidification processes. In an earlier paper (Metall Res Technol 100: 1043–1061, 2003), we showed that Bcr depends on the crucible radius (R) and frequency of the magnetic field (f). The effect of wall roughness (WR) on Bcr was investigated in this study. Using ten different wall materials, we determined the angular frequency (ω) and Reynolds number (Re) as a function of the magnetic induction (B) and f using two different measuring methods (pressure compensation method, PCM; height measuring method, HMM). The experiments were performed at room temperature; therefore, the Ga75wt%In25wt% alloy was chosen for the experiments. Based on the measured and calculated results, a simple relationship was determined between Bcr and Re*, f, R, and WR, where the constants K1, K2, K3, and K4 depended on the physical properties of the melt and wall material:$$Bcr\left({Re}^{*},f,R,WR\right)=\frac{{Re}^{*}}{{R}^{2}}({K}_{1} {f}^{-K2}+{K}_{3} {f}^{-K4} WR)$$ B c r Re ∗ , f , R , W R = Re ∗ R 2 ( K 1 f - K 2 + K 3 f - K 4 W R )

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Effect of rotating magnetic field on the microstructure and properties of Cu–Ag–Zr alloy

Cited by 19 publications

References 28 publications

Modification of the microstructure by rotating magnetic field during the solidification of Al-7 wt.% Si alloy under microgravity

Modification of the microstructure by rotating magnetic field during the solidification of Al-7 wt.% Si alloy under microgravity

Effect of Electromagnetic Stirring on the Microstructure and Properties of Fe-Cr-Co Steel

Effect of crucible wall roughness on the laminar/turbulent flow transition of the Ga75In25 alloy stirred by a rotating magnetic field

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