Two-Color-Thermography for Temperature Determination in Laser Beam Welding of Low-Melting Materials.

ABSTRACT: Spatial and temporal knowledge of temperature evolution is crucial in laser beam welding of low-melting materials such as aluminum alloys. Current temperature measurements are restricted to (i) one-dimensional temperature information (e.g., ratio-pyrometers), (ii) a priori knowledge of emissivity (e.g., thermography), and (iii) high-temperature regions (e.g., two-color-thermography). This study presents a ratio-based two-color-thermography system that enables acquiring spatially and temporally resolved temperature information for low-melting temperature ranges (<1200 K). The study demonstrates that temperature can be accurately determined despite variations in signal intensity and emissivity for objects emitting constant thermal radiation. The two-color-thermography system is further trans

SUBMITTER: Schwarzkopf K 

PROVIDER: S-EPMC10220973 | biostudies-literature | 2023 May

REPOSITORIES: biostudies-literature