Circumstances of nondestructive examination on weld.

Ultrasonic Examination of a CVCS Weld

The anisotropic, heterogeneous and coarse granular structures of austenitic stainless steel welds may lead to important disturbances of the ultrasonic propagation : beam skewing and splitting, attenuation, backscattering and spurious echoes. Numerous studies were undertaken by EDF R&D and CEA for a few years to study these disturbances and to improve the ultrasonic NDT in nuclear applications. ...

Examination of Weld Defects by Computed Tomography

Ispitivanje grešaka zavara kompjutorskom tomografi jom. Ispitivane su greške u zavarenom spoju niskougljičnog čelika S235JR debljine 6 mm zavarenog MAG postupkom. Uzorak koji sadrži greške naljepljivanja i pore je ispitivan kompjutorskom tomografi jom KT. Programskom analizom tomografa je određena veličina i pozicija grešaka naljepljivanja kao i dimenzije i raspored pratećih pora u zavarenom sp...

Ultrasonic Examination of a Weld Repair in Ni-based Alloy

The anisotropic, heterogeneous and coarse granular structures of austenitic stainless steel welds lead to important disturbances of the ultrasonic propagation: beam skewing and splitting, attenuation, backscattering and spurious echoes. These disturbances have been studied by EDF R&D for a few years in order to improve the ultrasonic NDT in nuclear applications. In particular, a methodology for...

Weld Overlay Examination Using Ultrasonic Phased Array Technology

Weld overlay of piping was first used as a method to repair components of simple configurations which were known to contain cracking. An adequate ultrasonic examination of these geometries can be achieved by using a few conventional search units. Currently the application of pre-emptive weld overlays as a mitigation technique and/or to improve the examination surface condition for more complex ...

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