Experimental and numerical study on infrared thermal wave imaging

The fast development of thermal wave imaging has led to the emergence of a novel technique of nondestructive evaluation (NDE) for thermophysical properties and subsurface defects of solids recently. This paper presents the experimental reserch on infrared thermal waving which can be used to measure thermal diffusivity and local heat transfer coefficient of thin materials. Numerical modeling of subsurface defect detecting is also performed for pulse-echo thermal wave imaging.