Short communication utilization of holography laser technique for ARC-welding faults detection

الملخص EN

Plates of mild steel, welded by arc-welding, had been tested using laser holography technique for inspecting the welding defects like: cracks, porosity and inclusions in these plates.

He-Ne laser with wavelength of 632.8nm and output power of 10mW was used to produce a double-exposure holographic interferometry, which was recorded by the film PFG-01for Butt-welding joints.

Thermal stress has been used for nano defects formation at the joints.

The same joints were investigated using X–ray technique in order to compare between the two techniques.

The double-exposure holographic interferometry showed fringes that indicate the position of the welding defects by using the thermal stress.

The results showed good agreement with that deduced by X–ray.