Influence that nanosecond electromagnetic pulses have on the acquisition of tin and the properties of its alloys

Komkov, V. G.; Gostishchev, V. V.; Ri, E. H.; Dorofeev, S. V.

doi:10.3103/s1067821211040067

Cited by 3 publications

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“…Komkov et al [ 46 ] used a GNP-type EMP generator with the following characteristics: the pulse duration was 0.5 ns, the amplitude was higher than 8 kV, and the repetition frequency of the pulses was 1000 Hz. Processing time was 0, 5, 10, 15, and 20 min.…”

Section: Results Of the Practical Use Of Pulsed Processing Of Metal M...mentioning

confidence: 99%

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Theory and Practice of Using Pulsed Electromagnetic Processing of Metal Melts

2022

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In industrial practice, various methods of external influences on metal melts are used. For example, vibration processing, exposure to ultrasound, and other physical fields. The main purpose of such influences is purposeful grinding of the metal structure, which contributes to the improvement of mechanical characteristics. The article presents an overview of research on pulse processing of ferrous and non-ferrous melts: processing with pulsed current, electromagnetic pulses and pulsed magnetic fields. The results of the analysis showed that, despite the different methods and devices used for these treatments, their effect on the structure and properties of the cast metal is generally the same. The main effect is observed in the refinement of the macro and microstructure and a simultaneous increase in the strength properties and plasticity. The intensity of the observed effects depends on the characteristics of the equipment used to create the pulses. The main characteristics are: pulse duration, pulse frequency, current amplitude, and power.

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Section: Results Of the Practical Use Of Pulsed Processing Of Metal M...mentioning

confidence: 99%

“… Dependence of the metal yield on the smelting time. ( 1 ) Without irradiation and ( 2 ) with irradiation [ 46 ]. …”

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Theory and Practice of Using Pulsed Electromagnetic Processing of Metal Melts

2022

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“…Как показывают накопленные к настоящему времени данные лабораторных и промышленных экспериментов, эффективным способом целенаправленного воздействия на структуру и свойства литейных сплавов является обработка расплавов наносекундными электромагнитными импульсами (НЭМИ) [26][27][28]. Высокая мощность (от 1,5 до 7,0 МВт) и малая длительность импульсов (от 0,1 до 1,0 нс) приводят к возникновению импульсных электромагнитных полей с напряженностью до 10 11 -10 12 В/м [29], при этом большая часть энергии импульса поглощается расплавом металла.…”

Section: Modification Of Al-mg-si Casting Aluminum Alloys By Liquid P...unclassified

Modification of Al–Mg–Si casting aluminum alloys by liquid phase processing with nanosecond electromagnetic pulses

Деев¹,

Ri²,

Прусов³

et al. 2021

Izv.VUZ. Tsvet. Met.

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The AA 511 alloy of the Al–Mg–Si system was used as an example to demonstrate that aluminum melt irradiation with nanosecond electromagnetic pulses (NEPs) leads to a significant change in the nature of structure formation during crystallization. It was found that an increase in the frequency of melt irradiation with NEPs is accompanied by the refinement of the alloy structural components, while the greatest grain size reduction of the α-solid solution and intergranular inclusions of the eutectic Mg2Si phase is observed at a NEPs frequency f = 1000 Hz. An increase in the NEPs frequency leads to a significant increase in the concentration of magnesium in the α-solid solution and the fragmentation of Mg2Si phase intergranular inclusions, which is released in the form of compact isolated inclusions when the melt is irradiated at a frequency of 1000 Hz. It was shown that melt processing with NEPs leads to an increase in the Brinell hardness of as-cast specimens, as well as to a significant increase in the microhardness of α-solid solution grains (from 38.21 HV in the initial state to 61.85 HV after irradiation with a frequency of 1000 Hz). It was assumed that the effect of a pulsed electromagnetic field leads to a decrease in the critical values of the Gibbs free energy required to initiate nucleation processes, and to a decrease in the surface tension at the «growing crystal – molten metal» interface, which causes a modifying effect on the alloy structure due to a decrease in the critical size of crystal nuclei.

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Grain Refinement of Casting Aluminum Alloys of the Al–Mg–Si System by Processing the Liquid Phase Using Nanosecond Electromagnetic Pulses

Деев

Прусов

et al. 2021

Russ. J. Non-ferrous Metals

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Influence that nanosecond electromagnetic pulses have on the acquisition of tin and the properties of its alloys

Cited by 3 publications

References 1 publication

Theory and Practice of Using Pulsed Electromagnetic Processing of Metal Melts

Theory and Practice of Using Pulsed Electromagnetic Processing of Metal Melts

Modification of Al–Mg–Si casting aluminum alloys by liquid phase processing with nanosecond electromagnetic pulses

Grain Refinement of Casting Aluminum Alloys of the Al–Mg–Si System by Processing the Liquid Phase Using Nanosecond Electromagnetic Pulses

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