The non-destructive testing of austenitic welds using ultrasound plays an important role in the assessment of the structural integrity of safety critical structures. The internal microstructure of these welds is highly scattering and can lead to the obscuration of defects when investigated by traditional imaging algorithms. This paper proposes an alternative objective method for the detection o...

A system is presented that allows the visualization of the whole welding process. Factors that can lead to bad welds can be monitored. Methods to optimize the welding process are outlined and a possible "on-line control" is discussed. In addition, schemes are presented for the analysis of the welding process to identify defects in the welding equipment that will cause faulty welds.

This article presents the results of a study by foreign scientists on technological feasibility method friction welding dissimilar materials. As well as information about research work authors creation resource-saving, universal and affordable technology for materials domestic engineering industries. The showed that is relevant has wide capability. It was also found there not used in conditions...

The demand for joining dissimilar metals has exponentially increased due to the global concerns about climate change, especially electric vehicles in automotive industry. Ultrasonic welding (USW) surges as a very promising technique join metals, providing strength and conductivity, addition avoid metallurgical defects, such formation of intermetallic compounds, brittle phases porosities. Howeve...

Abstract Fillet welds made by the corner stationary-shoulder friction stir welding process between AA7050-T7451 and AA2024-T4 sheets were characterized using different metallographic techniques mechanical testing. Robotic of an aircraft’s skin-to-internal stiffeners examined Barker’s electrolytic Keller’s etching correlated with electron backscattered diffraction results energy-dispersive micro...

The paper aims at presenting a framework for visual inspection and defect detection of steel pipe welds in chemical and nuclear power plants. Pipe welds are examined by means of X-ray (XR) and ultrasound (US) sensors; collected data are separately processed in order to extract features used in the fusion phase to detect and measure possible defects. Results obtained on real images are presented...