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Stepanova L.N.,Novosibirsk State University | Ramazanov I.S.,Siberian Aviation Research Institute | Kanifandin K.V.,Novosibirsk State University
Russian Journal of Nondestructive Testing | Year: 2010

A method for detecting hazardous sources of acoustic-emission (AE) signals by the level of their energy activity using clustering by digitized signal shape was considered. The influence of the distance between a source and an AE transducer on the energy of recorded AE signals was analyzed. The energy distribution median of signals in a cluster was proposed for evaluating the hazard of an AE signal source. The application of the developed method was tested based on the example of the analysis of AE inspection data on the welding of steel specimens with incomplete fusion and a crack at the root of a weld seam. This testing confirms the results of the fractographic inspection of a defective weld seam. © 2010 Pleiades Publishing, Ltd.

Stepanova L.N.,Siberian Aviation Research Institute | Kanifadin K.V.,Siberian Aviation Research Institute | Ramazanov I.S.,Siberian Aviation Research Institute
Russian Journal of Nondestructive Testing | Year: 2010

The experimental dependences of changes in the output signals of standard and high-temperature acoustic-emission transducers (AETs) during heating and cooling are considered. It is shown that high-temperature AETs have a hysteresis that must be taken into account in high-temperature tests of various materials. The errors in localizing acoustic-emission signals from a simulator during heating and cooling of high-temperature and standard AETs are analyzed using the two-interval method. © Pleiades Publishing, Ltd., 2010.

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