Weld pool surface temperature measurement from polarization state of thermal emission
TypeArticles dans des revues avec comité de lecture
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 at a near-infrared wavelength corresponding to a blind spectral window of a helium plasma generated during gas tungsten arc welding process. The refractive index of liquid metal and the surface radiance are deduced from the polarisation state of thermal emissions. Based upon the knowledge of both characteristics, the temperature distribution can be calculated.
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STOLZ, C.; CONIGLIO, Nicolas; MATHIEU, A.; AUBRETON, O. (SPIE, 2015)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 ...
CONIGLIO, Nicolas; MEZGHANI, Sabeur; EL MANSORI, Mohamed; CABRERO, J. (Elsevier, 2018)Surface texturation at micro- and meso-scales plays an important role in applications where cosmetic, aesthetic and self-cleaning functionalities are specified. This research paper deals with a multiscale surface, in which ...
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 ...
KURJI, Rahim; CONIGLIO, Nicolas; GRIGGS, J.; GHOMASHCHI, R. (Taylor and Francis, 2017)The Welding Institute of Canada (WIC) test is a simple and standardised weldability test for hydrogen assisted cold cracking that was developed in the 80s. It has been extensively utilised by the industry to qualify safe ...
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 ...