Liquid metals surface temperature fields measurements with a two-colour pyrometer

The paper presents an apparatus to measure surface temperature distribution of liquid metals during fusion processes. The apparatus is based on dual wavelength radiation thermometry and is designed to measure temperature from 1500 to 3000K. The pyrometer is based on standard optical parts and indust...

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Bibliographic Details
Published in:Measurement : journal of the International Measurement Confederation 2017-04, Vol.101, p.72-80
Main Authors: Monier, Romain, Thumerel, François, Chapuis, Julien, Soulié, Fabien, Bordreuil, Cyril
Format: Article
Language:English
Subjects:
Alloys
CCD cameras
Engineering Sciences
Fluids mechanics
Instrumentation and Detectors
Laser beam melting
Laser melting
Liquid metals
Measurement
Mechanics
Physics
Signal and Image processing
Solidification
Solidification front
Surface temperature
Temperature
Temperature distribution
Temperature fields
Thermography
Tungsten
Two-colour pyrometer
Uncertainty analysis
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Summary:The paper presents an apparatus to measure surface temperature distribution of liquid metals during fusion processes. The apparatus is based on dual wavelength radiation thermometry and is designed to measure temperature from 1500 to 3000K. The pyrometer is based on standard optical parts and industrial CCD cameras. Uncertainties are analysed on the base of the radiometric equations. To insure relative precision in the measurement, a calibration procedure is conducted on tungsten ribbon with known emissivity in the temperature range. This procedure is also used to discuss the influence of wavelength couples. To conclude, experimental measurements on pure laser melted materials are conducted to assess the validity of the apparatus and methodology.
ISSN:0263-2241
1873-412X
DOI:10.1016/j.measurement.2016.12.031