Electric arc shape and weld bead geometry analysis under the electromagnetic constriction and expansion effect

Antonello, Miguel Guilherme; Bracarense, Alexandre Queiróz; Silva, Régis Henrique Gonçalves e; Pigozzo, Ivan Olszanski; Okuyama, Marcelo Pompermaier

doi:10.1007/s00170-021-08064-5

Cited by 6 publications

(2 citation statements)

References 28 publications

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“…The presence of a magnetic field resulted in significant enhancements in penetration shape factors for both NSN and SNS configurations, with improvements of 58% and 46% recorded, respectively. This is advantageous for weld overlays, as wider bead width and shallower penetration are more desirable, as reported by [4,11,15]. 4.…”

Section: Discussionmentioning

confidence: 92%

“…They highlighted that the magnetic frequency and magnetic field density are crucial factors that improve weld bead quality and strength. Antonello et al [11] analysed the impact of a magnetic field on the arc shape and bead geometry. They revealed that when an electromagnetic field was applied, the shape of the electric arc transformed from cylindrical to elliptical, and the magnitude of this change increased with higher excitation of the coils.…”

Section: Introductionmentioning

confidence: 99%

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Characterisation of weld bead and microhardness of SS316L weld overlays on S355J2+N steel using GTAW under E-type magnet

Raj,

Gill

2023

Eng. Res. Express

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In this study, a three-pole (E-type) electromagnet with magnetic configurations north-south-north (NSN) and south-north-south (SNS) was installed in the GTAW process to generate a combination of two symmetrically transverse external magnetic fields around the weld arc and the molten pool. The effects of magnetic fields obtained by these two types of magnetic configurations (NSN and SNS) on the weld bead characteristics and microhardness in GTAW were analysed. In these experiments, high-strength low alloy (HSLA) S355J2+N grade with a thickness of 10 mm was selected as the substrate material and S316L as the filler wire. Using magnetic fields during the welding process successfully enhanced the weld bead appearance and shape and improved the mechanical characteristics of weld overlays. It was also observed that for different values of excitation current, magnetic fields generated with both configurations ( i.e., NSN and SNS) provide greater bead width, a higher penetration shape factor, and higher microhardness values in comparison to specimens welded with conventional GTAW. The NSN and SNS configurations of the E-type magnet improve the penetration shape factor by 58% and 46%, respectively. These configurations were more suitable for weld overlays (cladding) and hardfacing. However, the observations indicated an enhancement in microhardness for all excitation current values by employing the NSN and SNS magnetic configurations.

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Section: Discussionmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%