Abstract

A Complete Standard for hypnotic impulse Formability

Author(s): Mheann Pascual

Despite its remarkable ability to join disparate materials and its environmental friendliness, magnetic pulse welding (MPW) faces a number of obstacles. Analytical calculations of the minimum impact velocity—also known as the conventional weldability criterion— as a function of material properties are used to determine the minimum impact velocity without considering the electromagnetic coil’s geometry or any other electrical or physical parameters. Consequently, a sound MPW joint requires the minimum impact velocity but is not sufficient. To get around the limitations of the standard criterion, a new weldability criterion called effective impact velocity is proposed. During the process and product proving stages, the effective impact velocity eliminates the need to fabricate multiple coils and can be inversely modelled to identify shop-floor relevant process parameters. The proposed method is demonstrated through a case study of aluminum and SS304 tubular welding. The soundness of the weld that was produced using computed process parameters was confirmed by experimental observations made using lap shear tests, hardness measurements, optical and scanning electron microscopy, and surface energy dispersive spectroscopy mapping. It is anticipated that this investigation will pave the way for the creation of a process window for MPW that makes use of a variety of material combinations and will save a lot of money and time.