Synergic Pulsed Gmaw – In Perspective

Barhorst, Steve; Cary, Howard B.

doi:10.1016/b978-0-08-031866-0.50006-8

Cited by 2 publications

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“…A CTWD of 52 mm exhibited the maximum reduction in energy input per unit length of 40% compared to the initial state. These results correspond to the state of the art in the field of joint welding and cladding as described [25,31].…”

Section: Analysis Of Elctrical Properties In Waam With Increased Ctwdsupporting

confidence: 89%

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Reduction of Energy Input in Wire Arc Additive Manufacturing (WAAM) with Gas Metal Arc Welding (GMAW)

et al. 2020

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Wire arc additive manufacturing (WAAM) by gas metal arc welding (GMAW) is a suitable option for the production of large volume metal parts. The main challenge is the high and periodic heat input of the arc on the generated layers, which directly affects geometrical features of the layers such as height and width as well as metallurgical properties such as grain size, solidification or material hardness. Therefore, processing with reduced energy input is necessary. This can be implemented with short arc welding regimes and respectively energy reduced welding processes. A highly efficient strategy for further energy reduction is the adjustment of contact tube to work piece distance (CTWD) during the welding process. Based on the current controlled GMAW process an increase of CTWD leads to a reduction of the welding current due to increased resistivity in the extended electrode and constant voltage of the power source. This study shows the results of systematically adjusted CTWD during WAAM of low-alloyed steel. Thereby, an energy reduction of up to 40% could be implemented leading to an adaptation of geometrical and microstructural features of additively manufactured work pieces.

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Section: Analysis Of Elctrical Properties In Waam With Increased Ctwdsupporting

confidence: 89%

“…This can be demonstrated throughout the following Equations (1)- (4). It has to be stated that a change of CTWD has no influence on the wire feeding speed and almost no influence on the arc voltage [31].…”

Section: Introduction and State Of The Artmentioning

confidence: 87%