Open AccessInvestigation of the characteristics of ion saturation current in plasma over the keyhole in the process of electron beam welding
Author(s) -
А. П. Слива,
I. A. Kharitonov,
A. L. Goncharov,
В. К. Драгунов,
A. V. Gudenko,
E. V. Terentyev
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2077/1/012019
Subject(s) - keyhole , welding , electron beam welding , materials science , plasma , atomic physics , plasma channel , laser beam welding , ion beam , beam (structure) , optics , electron , cathode ray , physics , composite material , quantum mechanics
The energy spectra of the ion saturation current of the Langmuir probe in the plasma formed over the keyhole directly during the process of electron-beam welding of steel 09G2S with the varied parameters (e.g., the welding speed and focus coil current) has been investigated. The presence of typical zones with the energy spectrum peaks in the low-frequency and high- frequency bands has been shown. It has been established that the peak location in the high- frequency range of the energy spectrum does not depend on the welding modes and the position of the probes relative to the keyhole. The low-frequency range of the energy spectrum depends on the vapor flow density of the keyhole and is rather sensitive to the welding modes. The use of electron beam oscillation makes it possible to control plasma flows and hydrodynamic processes in the penetration channel.