Energy field assisted metal forming: Current status, challenges and prospects

Li, H.; Peng, L.F.; Meng, B.; Xu, Z.T.; Wang, L.L.; Ngaile, G.; Fu, M.W.

doi:10.1016/j.ijmachtools.2023.104075

Cited by 18 publications

(2 citation statements)

References 219 publications

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“…However, for aluminum-silicon alloys with a silicon content exceeding 4%, the refining effect of titaniumcontaining refiners decreases due to the toxic reaction between titanium and silicon. In the case of Al-Si alloys, the microstructure depends not only on its dendritic structure but also on the size and morphology of the eutectic Si particles [7][8][9]. Researchers use two or more refining agents and modifiers to refine α-Al and eutectic Si in Al-Si alloys [10].…”

Section: Introductionmentioning

confidence: 99%

Effect of High-Frequency Electric Pulse on the Solidification Microstructure and Properties of Hypoeutectic Al-Si Alloy

Guo,

Wang,

Zhang

et al. 2024

Materials

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The effects of different pulse frequencies on the microstructure grain size and solid solubility of Al-9Si alloy were systematically investigated using OM, SEM, and EDS. The impact on the mechanical properties of the alloy was analyzed using a micro-Vickers hardness tester and multifunctional friction tester. During solidification, the Al-9Si alloy is exposed to high-frequency electric current pulses with a current density of 300 A/cm2 and frequencies of 0 Hz, 500 Hz, 1000 Hz, and 2000 Hz. The experimental results show that the Lorentz force also increases as the high-frequency pulse frequency increases. Intense electromagnetic stirring leads to grain refinement. However, as the pulse frequency continues to grow, the combined effect of Joule heating and Lorentz force results in an enlargement of the melt zone and an increase in grain size. At a pulse frequency of 1000 Hz, the eutectic structure size of the Al-9Si alloy is optimal, with the average size being reduced to 13.87 μm and a dense distribution, effectively eliminating primary Si. The EDS results revealed that the high-frequency pulse led to a more uniform distribution of Si elements within the matrix, and the solid solubility of Si in the α-Al matrix increased to a maximum value of 1.99%, representing a 39.2% increase. At a pulse frequency of 1000 Hz, the sample demonstrates the most favorable mechanical properties, with the friction coefficient reaching a minimum value of 0.302, representing a 37.7% decrease in the average friction coefficient. The results demonstrate that high-frequency pulsing is an effective method for enhancing the mechanical properties of Al-9Si alloy.

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Section: Introductionmentioning

confidence: 99%

Effect of High-Frequency Electric Pulse on the Solidification Microstructure and Properties of Hypoeutectic Al-Si Alloy

Guo,

Wang,

Zhang

et al. 2024

Materials

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show abstract

“…This method offers the advantages of being environmentally friendly, cost-effective, and utilizing high-energy unbalanced input modes, rapid heating, and rapid cooling. As a result, it has garnered significant attention from researchers [9][10][11][12][13]. In the solidification of hypoeutectic Al-Si alloy, high-frequency electrical pulses have been shown to regulate the solidification structure by adjusting the morphology and dynamic characteristics of the phase transition interface, thereby optimizing the alloy's comprehensive mechanical properties [14].…”

Section: Introductionmentioning

confidence: 99%

Effect of High-Frequency Electric Pulse on the Solidification Microstructure and Properties of Hypoeutectic Al-Si Alloy

Wang,

Guo,

Zhang

et al. 2023

Preprint

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The effects of different pulse frequencies on the microstructure grain size and solid solubility of Al-9Si alloy were systematically investigated using OM, SEM, and EDS. The effects on the mechanical properties of the alloy were analyzed using micro-Vickers hardness tester and multifunctional friction tester. During the solidification process, the Al-9Si alloy is exposed to high-frequency electric current pulses with a current density of 300A/cm2 and frequencies of 0Hz, 500Hz, 1 000Hz, and 2 000Hz. The experimental results show that as the high-frequency pulse frequency increases, the Lorentz force also increases. The intense electromagnetic stirring leads to grain refinement. However, as the pulse frequency continues to increase, the combined effect of Joule heating and Lorentz force results in an enlargement of the melt zone and an increase in grain size. At a pulse frequency of 1 000Hz, the eutectic structure size of the Al-9Si alloy is optimal, with the average size reduced to 13.87μm and a dense distribution, effectively eliminating primary Si. The EDS results revealed that the high-frequency pulse led to a more uniform distribution of Si elements within the matrix, and the solid solubility of Si in the α-Al matrix increased to a maximum value of 1.99%, representing a 39.2% increase. At a pulse frequency of 1 000Hz, the sample demonstrates the most favorable mechanical properties, with the friction coefficient reaching a minimum value of 0.302, representing a 37.7% decrease in the average friction coefficient. The results demonstrate that high-frequency pulsing is an effective method for enhancing the mechanical properties of Al-9Si alloy.

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Breaking through the bending limit of Al-alloy tubes by cryogenic effect controlled mechanical properties and friction behaviours

Sun,

Li,

Yang

et al. 2024

International Journal of Machine Tools and Manufacture

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Energy field assisted metal forming: Current status, challenges and prospects

Cited by 18 publications

References 219 publications

Effect of High-Frequency Electric Pulse on the Solidification Microstructure and Properties of Hypoeutectic Al-Si Alloy

Effect of High-Frequency Electric Pulse on the Solidification Microstructure and Properties of Hypoeutectic Al-Si Alloy

Effect of High-Frequency Electric Pulse on the Solidification Microstructure and Properties of Hypoeutectic Al-Si Alloy

Breaking through the bending limit of Al-alloy tubes by cryogenic effect controlled mechanical properties and friction behaviours

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