Real time polarization imaging of weld pool surfaces
TypeCommunications avec actes
The search for an efficient on-line monitoring system focused on the real-time analysis of arc welding quality is an active area of research. The topography and the superficial temperature field of the weld pool can provide important information which can be used to regulate the welding parameters for depositing consistent welds. One difficulty relies on accessing this information despite the bright dazzling welding arc. In the present work, Stokes polarimetry and associated shape-from-polarization methods are applied for the analysis of the weld pool through its 810 nm-wavelength infrared emissions. The obtained information can provide a better understanding of the process, such as the usage of the topography to seek Marangoni flows direction, or to have a denser 3D map to improve numerical simulation models.
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CONIGLIO, Nicolas; MATHIEU, A.; AUBRETON, O.; STOLZ, C. (Taylor and Francis, 2016)This paper presents a passive polarimetry method using a division of aperture optical device in order to measure the temperature distribution at the weld pool surface. Thermal emission from a hot liquid metal was investigated ...
KURJI, Rahim; CONIGLIO, Nicolas (Springer, 2015)Industry and research have long desired the establishment of standards for weldability testing in regards to hydrogen assisted cold cracking formation. This would have the obvious advantage of allowing data to be reliably ...
CONIGLIO, Nicolas; SIVARUPAN, T.; EL MANSORI, Mohamed (SPRINGER, 2018)The development of sand mold three-dimensional printing technologies enables the manufacturing of molds without the use of a physical model. However, the effects of the three-dimensional printing process parameters on the ...
CONIGLIO, Nicolas; CROSS, Carl E. (Carl Hanser Verlag, 2014)A mass-balance model has been evaluated that estimates the critical conditions for sustaining continuous crack growth in the weld mushy zone. With the aid of a strain partition model, the critical local strain rate (across ...
SANITAS, A.; CONIGLIO, Nicolas; BEDEL, M.; EL MANSORI, Mohamed (SPRINGER, 2017)The sand mold 3D printing technologies enable the manufacturing of molds with great dimensional accuracy. However, the roughness of as-cast components is higher when cast in a 3D printed mold rather than in a traditional ...