Abstract
Two ultrasonic inspection procedures are presented for evaluating metal-to-metal structural adhesive joints by their efficiency. The first procedure, based on ultrasonic scanning with a high-focus probe, has been used to detect microporosity and non-homogeneity of the adhesive and areas showing poor bonding. By the other approach, based on ultrasonic spectrum analysis, an evaluation has been made of bond strength, since this property is intimately related to spectrum analysis values. The tests were performed on joints made in commercial aluminium sheet. Three different two-part adhesives were used, each mixed in four different proportions to produce a range of results.
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