Effects of the microstructure of pretreated aluminum joints AA2024 T3 on the ultrasonic evaluation of adhesion

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• 作者：Valentina Vlasie Belloncle ; Martine Rousseau ; Nicolas Terrien
• 关键词：Aluminum bonded joints ; Surface treatment ; Durability ; Ultrasounds ; Roughness ; Stiffnesses
• 刊名：NDT and E International
• 出版年：2007
• 出版时间：September 2007
• 年：2007
• 卷：40
• 期：6
• 页码：419-427
• 全文大小：379 K

文摘

This paper is concerned with the ultrasonic characterization of the adhesion in a structural bond subjected to various surface pretreatments. The aim is: (a) to know if the non destructive evaluation allows to distinguish three types of pretreatments and (b) to optimize the procedure (e.g. time of steeping, concentration of the solution, temperature) for a given surface treatment in order to obtain a better durability of structural joints. This distinction is based on the measurement of the cutoff-frequencies of the guided waves. The comparison with two rheological models leads to a classification of the pretreatments according to their effectiveness.