Effect of Pulsed Magnetic Field on Microstructure and Mechanical Properties of Eutectic Al-Si Alloy

Zhang, L.

doi:10.1007/s11663-012-9778-4

Cited by 8 publications

(5 citation statements)

References 16 publications

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“…However, the eutectic silicon in the alloy treated by PMF was refined remarkably, and the morphology of eutectic silicon changed into fibrous, as Figure 2(d) depicted. The reasons for the formation of fine primary α-Al and eutectic silicon particles under the action of PMF had been reported elsewhere [18,19,22].…”

Section: Resultsmentioning

confidence: 96%

“…PMF was started immediately after pouring until the melt completely solidified. The PMF process details were mentioned elsewhere [18,19]. The PMF process parameters were briefly summarised as follows: the discharging voltage was 250 V and the discharging frequency (numbers of per-second discharging) was 10 Hz.…”

Section: Methodsmentioning

confidence: 99%

“…Results of our previous research showed that the eutectic silicon in eutectic Al-Si alloys was significantly modified under the action of PMF [18,19], and the mechanical properties of eutectic Al-Si alloys were increased [18]. Moreover, PMF process has several advantages [20][21][22] such as low investment, high efficiency, simple equipment, extensive alloy application scope, as well as low pollution due to the noncontact with the melt.…”

Section: Introductionmentioning

confidence: 99%

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Microstructure and properties of A357 aluminium alloy treated by pulsed magnetic field

Zhang

Zhan

Jin

et al. 2018

Materials Science and Technology

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This study examined the effects of a pulsed magnetic field (PMF) on the solidified microstructure and properties of A357 aluminium alloy. Results showed that the solidified microstructure of the alloy treated by a PMF was refined. The treated alloy in the T6 state had superior mechanical properties, with the ultimate tensile strength, yield strength and elongation increasing by 48 MPa (18.5%), 46 MPa (16.4%) and 4.8% (142%), respectively, when compared with the untreated alloy. When testing at room temperature, with a strain amplitude of 1 × 10−4 and at a frequency of 1 Hz, the damping capacity value was 14.2 × 10−3 for the alloy subjected to a PMF treatment, which increased by nearly 170% when compared with the untreated alloy.

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Section: Resultsmentioning

confidence: 96%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Microstructure and properties of A357 aluminium alloy treated by pulsed magnetic field

Zhang

Zhan

Jin

et al. 2018

Materials Science and Technology

Self Cite

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“…optical microscopes and scanning electron devices were used for capturing of the microstructural, the zooming of these devices used to clear the boundaries of the grains. The obtained images were analyzed by the software of ImageJ (FiJi) to determine the types and sizes of the crystals structures (Zhang, 2013). The results were obtained for the prepared specimens of PMF with various voltages (0, 40, 60, 100, 120 and 180) volts.…”

Section: Methodsmentioning

confidence: 99%

Microstructure Refinement for Fe-34Mn-10Al-0.76C Alloy Using Variable Pulsing Magnetic Field (PMF) Solidification

Al-Meshaiei¹,

Ahmad²,

Elgarhi³

2020

JMSR

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Background: The effect of the pulsed electromagnetic fields with different fluxes (voltages) on the microstructure of an alloy during all stages of solidification under specified thermal conditions will be discussed in this project. Experiments were carried out in the university laboratory for this purpose. The optical scanning, electron microscopy scanning, and dispersed X-ray analysis methods were used to analyze the results of the micro-solidification formulations of the alloy with different fluxes. To perform the required evaluation, a control sample was tested without any treatment, then the results of every flux were compared with the results of this control sample. The applied magnetics flux and Lorentz forces were considered as the main reasons for the achieved grain refining and diffusion of the improved solubility in the sample. The fully equiaxed dendritic structure has been realized for the aluminum alloys at 180 Volts flux. Lorentz's strong force, induced by the magnetic field, deactivates the developing direction of the bifurcation (dendrites), as well as spoils the directions of growing the intermetallic alloy, as a result of the formation of solid microstructures. Further refinements were achieved, by increasing the voltages. Therefore, it can be concluded that the pulsed electromagnetic field is a promising technique that can be utilized in the metallurgy evolution. The effect of PMF with different fluxes on the microstructure of the Fe-34Mn-10Al-0.76C alloy samples will be examined experimentally using optical scanning, EDX and SEM and by applying various analysis techniques. Then, compared with the control sample that don’t treated with any PMF. The initial dendrites growth direction and size were changed according to the PMF flux. Also, the lengths of the initial dendrites were reduced by increasing the voltage, which led to the formation of different dendrite equiaxed grains. The PMF flux affects the initial dendrites growth direction and size. While, increasing the PMF voltage reduces the lengths of the initial dendrites. Moreover, the PMF has a great impact on diffusion of solute through solidification that then influences the formation of eutectic microstructural.

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“…The effect of convective transport is highly dependent on all aspects of the magnetic field including, orientation, 7) magnitude and time dependent fluctuations. 8) Grain refinement has been observed through the use of pulsed magnetic fields. 9,10) A slow rotating magnetic field has been shown to produce a helical structure, 11) which can be attributed to a modification in convective segregation.…”

Section: Introductionmentioning

confidence: 99%

Influence of a Slow Rotating Magnetic Field in Thermoelectric Magnetohydrodynamic Processing of Alloys

2014

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The effects of a slow rotating magnetic field on Thermoelectric Magnetohydrodynamics during alloy solidification were investigated using a micro-scale numerical model. For conventional directional solidification it was shown that in general the time-dependent acceleration force on the fluid flow is negligible.Using an undercooled growth model with directional solidification approximations the effect on dendritic morphology is predicted, suggesting thermoelectric induced flows will create a significant increase in secondary branching and preferential growth directions on one side of the primary trunk. The extent of macro-segregation under these conditions was also estimated.

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Effect of Pulsed Magnetic Field on Microstructure and Mechanical Properties of Eutectic Al-Si Alloy

Cited by 8 publications

References 16 publications

Microstructure and properties of A357 aluminium alloy treated by pulsed magnetic field

Microstructure and properties of A357 aluminium alloy treated by pulsed magnetic field

Microstructure Refinement for Fe-34Mn-10Al-0.76C Alloy Using Variable Pulsing Magnetic Field (PMF) Solidification

Influence of a Slow Rotating Magnetic Field in Thermoelectric Magnetohydrodynamic Processing of Alloys

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