Fatigue damage in fieldshapers used during electromagnetic forming and welding processes at high frequency impulse current

Saadouki, Bouchra; Sapanathan, Thaneshan; Pelca, Philippe; Elghorba, Mohamed; Rachik, Mohamed

doi:10.1016/j.ijfatigue.2017.12.019

Cited by 10 publications

(1 citation statement)

References 31 publications

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“…As the flyer-target assembly undergoes a progressive deformation along the overlapped length, a fine mesh of the solution domain with a large number of discrete elements is a requisite [33,37,38]. The transient change of the EM field as the flyer moves away from the coil further requires a coupled field analysis, which is often neglected [39]. Recent efforts involved an independent calculation of the EM field and pressure at considering the deformed flyer-target assembly at discrete time-steps, which required a significant volume of computational time and resources [33].…”

Section: Process Mechanics and Theoretical Backgroundmentioning

confidence: 99%

Analytical Estimation of Electromagnetic Pressure, Flyer Impact Velocity, and Welded Joint Length in Magnetic Pulse Welding

Shotri

Faes

Racineux

et al. 2022

Metals

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Magnetic pulse welding involves the joining of two metallic parts in a solid state by the use of a short and intense electromagnetic impulses and the resulting impact between the parts. The coalesced interface undergoes visco-plastic deformation at a high strain rate and exhibits a wavy shape at a microscopic scale. A practical estimation of the electromagnetic pressure, impact velocity and welded joint length as a function of the process conditions and the electromagnetic coil geometry is required but currently not available. Three novel analytical relations for the estimation of the electromagnetic pressure, impact velocity, and welded joint length for magnetic pulse welding of tubes and sheets, are presented. These relations were developed systematically, following a dimensional analysis, and validated for a wide range of conditions from independent literature. The comparison of the analytically computed results and the corresponding values reported in the literature has illustrated that the proposed analytical relations can be used for the estimation of the electromagnetic pressure and impact velocity for the magnetic pulse welding of tubes and sheets with a good level of confidence. The analytically calculated results for the welded joint length show a little discrepancy with the corresponding experimentally measured values. Further investigations and more experimentally measured results are required to arrive at a more comprehensive analytical relation for the prediction of welded joint length.

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