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The article presents an attempt at the clarification of low-amplitude indications, i.e. below the level of assessment, frequently detected in ultrasonic tests of welded joints. The above-named indications, non-evaluable in accordance with requirements of related standards used in ultrasonic tests, are often present in MAG-welded joints. The attempted clarification of the above-named exemplary indications...
The article concerns the time of flight diffraction testing technique TOFD, which is, next to the simultaneous TOFD + Phased Array testing, one of the most effective methods of volumetric NDT examination. The article discusses the advantages of TOFD technique as well as the basis of diffraction phenomenon and formation of imaging signals. The TOFD image of the welded joint and description of its characteristic...
The article presents the analysis of guidelines contained in PN-EN ISO 17640 related to ultrasonic tests of welded joints with reference to aligning the angle of beam introduction into a weld fusion line as well as the results of tests investigating the bevelling angle effect on the amplitude of echo bounced off the bevelled surface simulating the echo bounced off incomplete side fusions. The tests...
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