The spectroscopy of the plasma plume induced during laser welding of stainless steel and titanium
| Autor: | J Kurzyna, W Kalita, Z Szymanski |
|---|---|
| Rok vydání: | 1997 |
| Předmět: |
Argon
Acoustics and Ultrasonics Physics::Instrumentation and Detectors Shielding gas Analytical chemistry chemistry.chemical_element Laser beam welding Welding Plasma Partial pressure Condensed Matter Physics Surfaces Coatings and Films Electronic Optical and Magnetic Materials law.invention chemistry Physics::Plasma Physics law Physics::Atomic and Molecular Clusters Spectroscopy Titanium |
| Zdroj: | Journal of Physics D: Applied Physics. 30:3153-3162 |
| ISSN: | 1361-6463 0022-3727 |
| DOI: | 10.1088/0022-3727/30/22/014 |
| Popis: | Results of spectroscopic measurements of laser-induced plasmas under welding conditions are presented and discussed. The metals welded were stainless steel and titanium. It is shown that the intensities of the atomic lines of metals give information on the peripheral region of the plasma plume. The plasma-plume parameters are found to be similar for these two metals. The ratios of intensities of the ionic and atomic lines of the metals give maximum temperatures of about 11 000 K. These temperatures are several thousand kelvins higher than the temperatures determined from the atomic lines. The plasma plumes over the keyhole consist of metal vapours diluted by argon used as the shielding gas. The electron densities determined from the Stark broadening of the argon lines are about . The average partial pressure of the metal vapours is found to be 0.2 atm, the argon partial pressure 0.6 atm and the remaining pressure is due to electrons. Equilibrium conditions have been examined and it has been found that the plasma is in local thermal equilibrium. |
| Databáze: | OpenAIRE |
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