Active Pulse Thermography
Active pulsed thermography is a non-destructive testing method where a short heat pulse is applied to the surface of a component, and the cooling over time is analyzed with an infrared camera. Local temperature differences reveal inhomogeneities in the material.
Physicochemical Mechanism of Action
A short heat pulse heats the surface of the component, while the infrared camera records the cooling over time. The temperature distribution on the surface reflects the thermal conductivity and inhomogeneities in the material.
Metallurgical Relevance & Risks in Welding
Inhomogeneities in the material, such as lack of fusion or incomplete cooling, lead to local temperature differences. These can be interpreted as signs of cracks, damage, or insufficient weld quality. Misinterpretation can lead to misunderstandings and unnecessary repairs.
Workshop Practice & Instructions
Use an infrared camera with high resolution and accurate time measurement capabilities. Apply a short, strong heat pulse to the surface of the component. Analyze the cooling over time and look for local temperature differences. Compare the results with reference data or historical measurements to make statements about material quality.