Online and in situ laser-induced breakdown spectroscopy for laser welding monitoring
| Autor: | P. A. Sdvizhenskii, A. Ya. Stavertiy, R. D. Asyutin, R. S. Tretyakov, Vasily N. Lednev, Sergey M. Pershin, M. Ya. Grishin |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
In situ Materials science business.industry 010401 analytical chemistry technology industry and agriculture Laser beam welding Welding respiratory system Laser 01 natural sciences Atomic and Molecular Physics and Optics 0104 chemical sciences Analytical Chemistry law.invention Paired samples law 0103 physical sciences Optoelectronics Continuous wave Laser-induced breakdown spectroscopy business Spectroscopy Instrumentation |
| Zdroj: | Spectrochimica Acta Part B: Atomic Spectroscopy. 175:106032 |
| ISSN: | 0584-8547 |
| DOI: | 10.1016/j.sab.2020.106032 |
| Popis: | The laser induced breakdown spectroscopy (LIBS) technique was suggested for online and in situ detection of laser welding process failures. For the first time, the LIBS technique was demonstrated to detect defective laser welding during in situ measurements. Three sensing procedures were verified to indicate defective laser welding: thermal emission spectroscopy of the welding melt pool induced by a continuous wave (cw) laser (passive sensing); online LIBS sampling of a solidified hot weld; in situ LIBS measurements of the melt pool surface. The passive sensing failed to detect problems of the laser welding process. Online LIBS measurements of a hot solidified weld did not succeed as well. However, in situ weld melt pool LIBS measurements revealed that defective and optimal welding can be distinguished with atomic/ionic lines signals comparison utilizing hypothesis testing by paired sample t-test. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect