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Appl. Sci. 2017, 7(1), 45; doi:10.3390/app7010045

Arc Shape Characteristics with Ultra-High-Frequency Pulsed Arc Welding

Department of Materials Processing, Beijing Universtity of Aeronautics and Astronautics, Beijing 100191, China
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Author to whom correspondence should be addressed.
Academic Editor: Hai-Lung Tsai
Received: 17 October 2016 / Revised: 2 December 2016 / Accepted: 7 December 2016 / Published: 3 January 2017
(This article belongs to the Special Issue Gas Tungsten Arc Welding)
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Abstract

Arc plasma possesses a constriction phenomenon with a pulsed current. The constriction is created by the Lorentz force, the radial electromagnetic force during arc welding, which determines the energy distribution of the arc plasma. Welding experiments were carried out with ultra-high-frequency pulsed arc welding (UHFP-AW). Ultra-high-speed camera observations were produced for arc surveillance. Hue-saturation-intensity (HSI) image analysis was used to distinguish the regions of the arc plasma that represented the heat energy distribution. The measurement of arc regions indicated that, with an ultra-high-frequency pulsed arc, the constriction was not only within the decreased arc geometry, but also within the constricted arc core region. This can be checked by the ratio of the core region to the total area. The arc core region expanded significantly at 40 kHz at 60 A. A current level of 80 A caused a decrease in the total region of the arc. Meanwhile, the ratio of the core region to the total increased. It can be concluded that arc constriction depends on the increased area of the core region with the pulsed current (>20 kHz). View Full-Text
Keywords: arc constriction; ratio of core region to the total; pulsed arc welding arc constriction; ratio of core region to the total; pulsed arc welding
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Yang, M.; Zheng, H.; Li, L. Arc Shape Characteristics with Ultra-High-Frequency Pulsed Arc Welding. Appl. Sci. 2017, 7, 45.

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