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Major advances have been made in recent years in nondestructive testing of welded steel structures. This paper reviews the latest developments in: (i) radiographic inspection; (ii) ultrasonics; (iii) alternating current potential drop technique; (iv) measurement of residual stress, and (v) in-production weld inspection. Areas where further useful progress can be made are also identified.
The generation of Rayleigh waves by a thermoelastic laser line source was studied to establish a quantitative basis for using this source in nondestructive testing and in materials characterization. Experiments using interferometric detection were carried out which showed that, for the near field of the line source, the Rayleigh pulse is a monopolar depression of uniform amplitude. A theoretical...
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