Title: The capability and application of horizontally polarised shear waves for the ultrasonic inspection of austenitic welds
Nuclear electric's NDT applications Centre, in collaboration with IzfP, Germany, has evaluated Electromagnetic Acoustic Trasnducers
(EMATs) for the generation of horizontally polarized shear (SH) waves for ultrasonic inspection of austenitic welds. A range of austenitic
weld blocks containing both realistic and artificial defects have been inspected using both angle compression wave probes and EMATs. The
comparison shows that SH wave results have good signal to noise ratio for the detection of defects and the SH wave images are much
"cleaner" than those for angel compression waves simplifying data interpretation. Modelling is used to explain the observed phenomena and
to predict cases where SH waves might be best employed and where SH waves offer no significant benfit over compression waves. The paper
discusses the benefits and drawbacks of using EMATs compared with angle compression wave probes and proposes inspection strategies
incorporating both probe types.
AU: Bohler, R.V.; Shipp, R.; Huebschen, G.
SO: Comite Europeen sur les Essais Non Destructifs -ECNDT-, Paris (Hrsg.)
6th European Conference on Non-Destructive Testing '94. Vol.2
Paris, 1994, S.851-855
European Conference on Non-Destructive Testing <6, 1994, Nizza>
LA: en
CC: 03.25; IZFP; Information Technology; Communication
UT: austenitic weld; electromagnetic-acoustic transducer; ultrasonic inspection
AV: IZFP
SM: F-0-308.B
ND: 95013000006
ED: 95/01/03
Source:
[ FhG Search form]
|Front Page|
| Abstracts List |
Rolf Diederichs 1.Oct. 1996, info@ndt.net