8th International Topical Meeting on Photoacoustic and Photothermal Phenomena
8 ITMP³ / 8éme conférence internationale de photoacoustique et photothermique

J. Phys. IV France 04 (1994) C7-693-C7-696
DOI: 10.1051/jp4:19947162

Remote detection of welds depth penetration by laser generated ultrasonics

D. Rochais¹, L. Paradis¹ and F. Lepoutre<sup>2

1</sup>  CEA DAM, BP. 12, 91680 Bruyères-le-Châtel, France
²  ONERA L3C, BP. 79, 92322 Châtillon, France

Abstract
This paper presents applications of the laser induced shear wave directivity pattern in the thermoelastic regime, to the detection and the in-depth profiling of overthickness and closed cracks perpendicular to the surface. Some results on academic samples and first measurements of actual depth profilings of welds are presented and discussed.

© EDP Sciences 1994

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