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It is demonstrated that it is possible, in principle, to study the reverse side of the welding arc cathode spot with a high-speed camera. Photographs of the reverse side of… Click to show full abstract
It is demonstrated that it is possible, in principle, to study the reverse side of the welding arc cathode spot with a high-speed camera. Photographs of the reverse side of the welding arc cathode spot were obtained for the first time. The discrete internal structure of the cathode spot is shown, and its individual structural elements were identified. A new object was observed in the burning of the welding arc, which was called a “free cathode spot.” Some parameters of the cathode spots (lifetime, the diameter of the front, and reverse sides) were estimated. A new conceptual approach to the study of the nature of the cathode spot is presented.
Journal Title: High Temperature
Year Published: 2019
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