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High-Resolution Thermal Imaging and Analysis of TIG Weld Pool Phase Transitions.

ABSTRACT: Tungsten inert gas (TIG) welding is a well-established joining process and offers the user flexibility to weld a large range of materials. Ultra-thin turbine tipping is an important application for TIG welding that is exceptionally challenging due to the wide range of variables needed to accurately control the process: slope times, arc control, travel speed, etc. We offer new insight into weld pool characteristics, utilizing both on- and off-line measurements of weld tracks. High-resolution thermal imaging yields spatially and temporally resolved weld pool phase transitions coupled with post-weld photographs, which gives a novel perspective into the thermal history of a weld. Our imaging system is filtered to measure a 10 nm window at 950 nm and comprises a commercial Sigma lens to produce a near-infrared (NIR) camera. The measured near-infrared radiance is calibrated for temperature over the range of from 800 to 1350 °C.

SUBMITTER: Boone N

PROVIDER: S-EPMC7731447 | biostudies-literature | 2020 Dec

REPOSITORIES: biostudies-literature

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High-Resolution Thermal Imaging and Analysis of TIG Weld Pool Phase Transitions.

Boone Nicholas N Davies Matthew M Willmott Jon Raffe JR Marin-Reyes Hector H French Richard R

Sensors (Basel, Switzerland) 20201205 23

Tungsten inert gas (TIG) welding is a well-established joining process and offers the user flexibility to weld a large range of materials. Ultra-thin turbine tipping is an important application for TIG welding that is exceptionally challenging due to the wide range of variables needed to accurately control the process: slope times, arc control, travel speed, etc. We offer new insight into weld pool characteristics, utilizing both on- and off-line measurements of weld tracks. High-resolution ther ...[more]

PMID: 33291394

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