International Journal of Material Forming

, Volume 3, Issue 3, pp 205–208 | Cite as

Magnetic field enhancement in electromagnetic forming systems using anisotropic materials

  • Alireza Karimi
  • Kaveh Niayesh
  • Mohammad Amin Bahmani
Original Research


Electromagnetic Forming (EMF) is a type of high rate forming which exploits pulsed power techniques to create high intensive pulsed magnetic fields to rapidly reshape metal parts. This technique is sometimes called magnetic pulse forming. In this technique, a metal work-piece is pushed to a die and formed by a pressure created using an intensive, transient magnetic field. This magnetic field is produced by passing a pulse of electric current through a forming coil in a pulsed power circuit. Application of field shapers has been proposed to enhance the magnetic fields and consequently to increase the applied magnetic pressure at some desired regions. In this paper, 3D Finite element simulations have been applied to study the magnetic field distribution during an electromagnetic forming process with anisotropic material. Anisotropic magnetic material is described using a permeability tensor. Elements of this tensor are obtained from different magnetization curves dependent on the direction of the magnetic field. It has been shown that application of anisotropic materials with appropriate lamination directions can result in an enhancement of the magnetic field at desired points as well as in better overall efficiencies.


Electromagnetic Forming Anisotropic Material Lamination Field Shaper 


  1. 1.
    Oliveira DA, Warwick MJ (2003) Electromagnetic forming of aluminum Alloy sheet. J Phys IV 110:293–298CrossRefGoogle Scholar
  2. 2.
    Batygin YV, Daehn GSK (1999) The pulse magnetic fields for progressive technologies, ColumbusGoogle Scholar
  3. 3.
    Haiping Yu, Li C, Zhao Z, Li Z (2005) Effects of field- shaper on magnetic pressure in electromagnetic forming. J Mater Process Tech 168:245–249CrossRefGoogle Scholar
  4. 4.
    Preikszas D, Steigerwald M, Hoffrogge P, Gnauck P United States Patent 6855938Google Scholar
  5. 5.
    Ryu JS, Yao Y, Koh CS, Shin YJ (2006) 3-D optimal shape design of pole piece in permanent magnet MRI using parameterized nonlinear design sensitivity analysis. IEEE Trans Magn 42(4):1351–1354CrossRefGoogle Scholar
  6. 6.
    Bahmani MA, Niayesh K, Karimi A “3-D simulation of the influence of field shaper on the magnetic field distribution in electromagnetic forming,” to be published in Journal of material processing technologyGoogle Scholar
  7. 7.
    Lin D, Zhou P, Badics Z, Fu WN, Chen QM, Cendes ZJ (2006) A new nonlinear anisotropic model for soft magnetic material. IEEE Trans Magn 42(4):963–966CrossRefGoogle Scholar

Copyright information

© Springer/ESAFORM 2009

Authors and Affiliations

  • Alireza Karimi
    • 1
  • Kaveh Niayesh
    • 1
  • Mohammad Amin Bahmani
    • 1
  1. 1.School of Electrical and Computer EngineeringUniversity of TehranTehranIran

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