Characterization of magnetic properties of nanocrystalline alloys under rotational magnetization

Chen, Long; Ben, Tong; Zhao, Hanyu; Fang, Chunhua; Wang, Youhua

doi:10.1063/1.5079996

Cited by 4 publications

(4 citation statements)

References 11 publications

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“…Electromagnetic forming (EMF) is a high-speed forming method that employs electromagnetic force pulses to shape metal workpieces [1]- [5]. Compared with traditional machining, the EMF features high strain rate (10 −3 -10 −5 s) that improves the forming process of metal materials [6]- [8]. Depending on the nature of the forming process, EMF can be divided into tube and sheet metal forming processes [9], [10].…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic Force Distribution and Forming Performance in Electromagnetic Forming With Discretely Driven Rings

Qiu

Abu-Siada

et al. 2020

IEEE Access

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Electromagnetic forming is a method of high-speed metal workpiece forming technology that uses electromagnetic force pulses generated from the interaction of the magnetic flux density and workpiece induced eddy current. The main challenge of this technology is the control of the eddy current and magnetic flux density to perform various forming processes. This paper is aimed at overcoming this challenge by introducing a new electromagnetic sheet forming method based on discretely driven rings. In this method, a set of discrete conducting rings are placed between the driving coil and the metal workpiece to enhance the shaping process of the workpiece. By changing the number and position of the rings, the induced eddy current can be adjusted, and different electromagnetic force distribution profiles can be realized. COMSOL software is used to develop an electromagnetic field-structure coupling model of the proposed electromagnetic forming method. The characteristics of the electromagnetic force distribution and its effect on the workpiece forming process are analyzed. Results show that the electromagnetic force distribution profile can be controlled by adjusting the rings physical parameters such as diameter, material, and position. The proposed method can effectively improve the performance of the conventional electromagnetic forming technology and has the potential for implementation in wide industry applications.

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Section: Introductionmentioning

confidence: 99%

Electromagnetic Force Distribution and Forming Performance in Electromagnetic Forming With Discretely Driven Rings

Qiu

Abu-Siada

et al. 2020

IEEE Access

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“…Compared with the traditional machining processing, electromagnetic forming has a high strain rate (10 3 -10 5 s −1 ) [4]- [7]. Hence, EMF can greatly improve the plastic deformation ability of the material and increase the forming limit [8]- [10]. Also, EMF exhibits a non-contact electromagnetic force that facilitates high surface quality and reduces the stress concentration during the forming process [11]- [13].…”

Section: Introductionmentioning

confidence: 99%

Coil Temperature Rise and Workpiece Forming Efficiency of Electromagnetic Forming Based on Half-Wave Current Method

et al. 2020

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Electromagnetic forming is a well-developed high-rate forming technology. An important issue of this technology is the temperature rise of the driving coil, which can adversely affect the coil service life. This paper is aimed at addressing this issue through detailed investigation of an electromagnetic forming based on half-wave current method. On the basis of the principle of electromagnetic forming and finite element modelling, this paper compares and analyzes the temperature rise profile of the driving coil along with the forming efficiency of the workpiece in the traditional discharge, the crowbar discharge and the halfwave current discharge models. Results show that with the same system discharge parameters, the half-wave current method can reduce the Joule heating of the driving coil from 1.82kJ to 1.3kJ, which effectively reduces the temperature rise of the driving coil. At the same time, the workpiece forming efficiency is improved from 9.6% to 11.8%. Thus, the half-wave current method can solve the issue of the temperature rise of the driving coil to some extent and promote the process of industrial applications of the electromagnetic forming technology. INDEX TERMS Electromagnetic forming technology, half-wave current, Joule heating, temperature rise. CHENGLIN WANG is currently pursuing the Ph.D. degree in electrical engineering with the

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“…The electromagnetic forming technology features high strain rate (10 3 − 10 5 s −1 ) and hence [4]- [7], it can improve the material plastic deformation ability and increase the forming limit by 5 to 10 times when compared to traditional machining processing [8]- [9]. Moreover, as the process does not involve any workpiece contact force, EMF technology features reduced stress on the workpiece and high surface quality of the resulted product [10]- [12].…”

Section: Introductionmentioning

confidence: 99%

Research on Forming Efficiency in Double-Sheet Electromagnetic Forming Process

et al. 2020

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Improving the forming efficiency at a reasonable cost has been the main challenge in the electromagnetic forming technology. Towards this aim, this paper proposes a simultaneous cost-effective double-sheet electromagnetic forming method using single driving coil. In order to highlight the features of the proposed technique, comparison of the performance of five electromagnetic forming models is presented. These models include a no-sheet model, single-sheet stationary model, single-sheet moving model, doublesheet stationary model and double-sheet moving model. For each model, electromagnetic force distribution and forming efficiency of the workpiece are analyzed. Furthermore, the influence of the pulse current width of the driving coil on the electromagnetic forming efficiency of the plate is investigated for all models. Results show that for the same system discharge parameters, electromagnetic forming efficiency of doublesheet is 21.14% whereas the single-sheet electromagnetic forming model only achieves 14.68% efficiency. Thus, the double-sheet electromagnetic forming technology can improve the low forming efficiency of a single-sheet electromagnetic forming method and at the same time, the method can form two workpieces simultaneously which makes it more cost effective than the single-sheet method. INDEX TERMS Electromagnetic force, electromagnetic forming technology, double-sheet model, forming efficiency.

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Characterization of magnetic properties of nanocrystalline alloys under rotational magnetization

Cited by 4 publications

References 11 publications

Electromagnetic Force Distribution and Forming Performance in Electromagnetic Forming With Discretely Driven Rings

Electromagnetic Force Distribution and Forming Performance in Electromagnetic Forming With Discretely Driven Rings

Coil Temperature Rise and Workpiece Forming Efficiency of Electromagnetic Forming Based on Half-Wave Current Method

Research on Forming Efficiency in Double-Sheet Electromagnetic Forming Process

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