Non-destructive real time monitoring of the laser welding process

0387578 - FZÚ 2013 RIV US eng J - Článek v odborném periodiku
Šebestová, H. - Chmelíčková, Hana - Nožka, Libor - Moudrý, J.
Non-destructive real time monitoring of the laser welding process.
Journal of Materials Engineering and Performance. Roč. 21, č. 5 (2012), 764-769. ISSN 1059-9495. E-ISSN 1544-1024
Grant CEP: GA AV ČR KAN301370701
Výzkumný záměr: CEZ:AV0Z10100522
Klíčová slova: defect detection * laser welding * penetration depth * plasma electron temperature
Kód oboru RIV: BH - Optika, masery a lasery
Impakt faktor: 0.915, rok: 2012
http://link.springer.com/content/pdf/10.1007%2Fs11665-012-0193-4

Laser welding is a high power density technology of materials joining that has many advantages in comparison with conventional fusion welding methods, for example, high accuracy, flexibility, repeatability and especially very narrow heat-affected zone which results in minimal workpiece distortions. Since it is still quite expensive technology, minimal spoilage is required. Effective system of quality control and processing parameters optimization must be established to reduce total costs, which is particularly required in industrial production. In this article some results of pulsed Nd:YAG laser welding process monitoring based on the measurement of plasma electron temperature are presented. The ability of designed sensor to detect weld penetration depth has been demonstrated. Plasma spectral lines intensities measurement can discover gap instabilities as well as local sheet thickness reduction.
Trvalý link: http://hdl.handle.net/11104/0216613