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- W2896669166 abstract "The understanding of basic phenomena which govern the plasma ignition and evolution is a very important problem in laser-material interaction, particulary in laser welding. On the plasma electronic density and temperature profiles depend one part of the energy coupling into the workpiece and then, the welding quality. In this paper, we present an experimental study about the plasma ignition and evolution during the interaction between a 1KW CO2 gaussian shape laser and Titanium or Iron targets in two cases: a static case, where we look at the effects of one laser pulse (1ms) upon a motionless target, and a dynamic case, with a cw laser and a moving target. Results from time resolved streak pictures, space resolved lines spectra, time resolved electronic temperature measurements and profilometry diagrams of the interaction areas will be presented and discussed. The major point of these experiments is the difficulty to initiate a shielding gas plasma above the workpiece at this power (the power density ranged from 105 to 107 W.cm−2). This result could be interpretated by the bidimensional aspect of the plasma expansion, highlighted in the static case.The understanding of basic phenomena which govern the plasma ignition and evolution is a very important problem in laser-material interaction, particulary in laser welding. On the plasma electronic density and temperature profiles depend one part of the energy coupling into the workpiece and then, the welding quality. In this paper, we present an experimental study about the plasma ignition and evolution during the interaction between a 1KW CO2 gaussian shape laser and Titanium or Iron targets in two cases: a static case, where we look at the effects of one laser pulse (1ms) upon a motionless target, and a dynamic case, with a cw laser and a moving target. Results from time resolved streak pictures, space resolved lines spectra, time resolved electronic temperature measurements and profilometry diagrams of the interaction areas will be presented and discussed. The major point of these experiments is the difficulty to initiate a shielding gas plasma above the workpiece at this power (the power density rang..." @default.
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- W2896669166 date "1988-01-01" @default.
- W2896669166 modified "2023-09-28" @default.
- W2896669166 title "Plasma studies CO2 laser-material interaction application to laser welding" @default.
- W2896669166 doi "https://doi.org/10.2351/1.5058011" @default.
- W2896669166 hasPublicationYear "1988" @default.
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