Non-destructive testing of defects in the welds with infrared camera

Pu Wang, Purdue University


Non-destructive testing (NDT) is a challenging area of study in testing and quality control. Different from destructive testing, this new method can reduced scrap costs and testing procedures while increasing detection speed of a flaw. Previous NDT has a common disadvantage that this technology is used to detect the flaws on the surface. And this work also has yielded impressive results, because of the lack of a reliable and safe heating source. Previous researches require the weld surfaces to be painted which adds to the unnecessary process. Without using a normal heating source, such as lasers or flashlamps, ultrasonic waves were considered as an ideal heating source because they can generate heat inside the study object. The temperature difference caused by the ultrasound can be used to detect the defects in welds of sun-gears with the use of an infrared (IR) camera.




Han, Purdue University.

Subject Area

Mechanical engineering

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