Non Destructive Testing applied to railway axles is performed both in production and in maintenance. During production, NDT is carried out at different stages adopting different techniques, while during maintenance (in-service inspection) only ultrasonic testing is usually carried out. The present paper is focused on some aspects of calibration related to the in-service inspection of railway axles by means of ultrasonic NDT. In particular, applied standards request to calibrate sensitivity on suitable reference blocks provided with notches. In order to investigate the performance of these notches in respect to real cracks, the echoes coming from fatigue cracks generated onto hollow axles made in A4T steel by means of a dedicated test bench have been compared with those detected from suitable reference blocks. The results suggest some clues for designing effective sample blocks for railway axles.
An analysis of UT echoes coming from fatigue cracks and artificial defects on railway axles
Eine Analyse von Ultraschallechos aus Ermüdungsrissen und künstlichen Fehlern an Eisenbahnachsen
2008
6 Seiten, 4 Bilder, 14 Quellen
Aufsatz (Konferenz)
Datenträger
Englisch
The Fatigue Strength of Railway Axles
British Library Conference Proceedings | 1992
|A study of fatigue cracks in car axles
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Research on corrosion fatigue of railway axles
Tema Archiv | 2011
|Measures to counter fatigue failure in railway axles
Engineering Index Backfile
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