NDTnet 1998 Aug, Vol.3 No.8

Abstract

The solid phase diffusion bonding of the product is used in various industrial fields to make making to high performance and making to a high function Near net shape in addition. However, the unjoint part by defective diffusion and the void occur in the interface in the solid phase diffusion bonding part of the different kind materials in the manufacturing process, and a minute defect such as the exfoliation occurs easily while using the product of the diffusion bonding in addition. Such a defect remarkably decreases the reliability of the product.
Therefore, it is important for judging the performance and the safety of the product to understand the size of the defect and the position by the ultrasonic method quantitatively. And, the reliability of the product improves further by feeding back this ultrasonic wave information to the manufacturing process.
This study detects the defect of the void and the exfoliation in the solid phase diffusion bonding interface of ductile cast iron and stainless steel with a nickel insert metal using ultrasonic testing method, and examine the influence of mutual interference of the reflectional wave both the defect and the interface.
As a result, the interference of the reflectional wave is shown the change for the position both the defects and the interfaces, and the size of the defect. And, the defect detection quantitatively clarified the change for the wave lengths, the reflection coefficient of sound pressure between materials and the reverse of phase.

Abstract Source:
Book of Abstracts, 7th European Conference on Non-Destructive Testing, 26-29 May 1998, ISBN: 87-986898-0-00

Full-Text Source:
Proceedings of the 7th European Conference on Non-Destructive Testing, 26-29 May 1998, ISBN:

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