Mechanic of Advanced and Smart Materials
Quarterly

Stress induction in steel parts using alternating magnetic field

Document Type : Original Article

Authors

Sirwan Farhadi 1
Mohammad Aslani 2

1 Department of Mechanical Engineering, University of Kurdistan

2 Department of Mechanical Engineering,, University of Kurdistan, Sanandaj, Iran.

https://doi.org/10.61186/masm.3.3.363
Abstract
In this research, the induction of high-frequency alternating stresses in steel parts using an alternating magnetic field has been investigated experimentally. This treatment, in addition to the induction of alternating stresses, can increase the temperature of the part and facilitate the release of residual stresses. Residual stresses caused by the welding process in the area around the weld line are a good example of the applications of this method. This method is very fast, and it can be used for small or large parts without space limitations. Also, the necessary equipment can be prepared easily at low costs.

In this study, a small coil with an iron core was used to induce the magnetic field, and a simple and cheap electric board was used to create an oscillating current in the coil. The electric board employs a high-frequency electronic switch in a DC circuit to generate a rectangular waveform voltage. The obtained experimental results show that the steel part can resonate at frequencies close to the first longitudinal natural frequency or its subharmonics, and in this case, normal stresses in the order of 100 MPa are induced in the part. By upgrading the electrical equipment prepared in this research, it is possible to increase the induced stresses several times. Hence, employing appropriate equipment, the high-frequency magnetic induction method can be used as an alternative method for stress relief of welded joints.

Keywords

Stress induction
Alternating magnetic field
Natural frequency
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Mechanic of Advanced and Smart Materials
Volume 3, Issue 3
Autumn 2023
Pages 363-379

  • Receive Date 04 October 2023
  • Revise Date 09 November 2023
  • Accept Date 19 December 2023

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