Pulsed Thermography Analysis
Pulse thermography analysis is an NDT method where a short heat pulse is applied to the surface and the cooling behavior is analyzed to detect subsurface defects. It enables precise measurements of material structure and deformation.
Physical-Chemical Mechanism of Action
A short heat pulse on the surface causes a rapid temperature increase. The material reacts by cooling down and releasing thermal energy. This process is monitored with an infrared sensor.
Metallurgical Relevance & Risks in Welding
The analysis of cooling behavior provides information about material structure, deformation, and possible defects such as cracks or hardness variations. Misinterpretation can lead to incorrect results, affecting quality assurance.
Workshop Practice & Action Instructions
Use a pulse thermographer with high resolution and precisely calibrated sensors. Let the heat pulse fall on the surface for 10-20 ms and observe the cooling behavior over 5-10 seconds. Analyze the data with specialized software tools to locate and classify defects.