Exploratory Development Of Nondestructive Testing Techniques For Diffusion Bonded Interfaces

Exploratory Development of Nondestructive Testing Techniques for Diffusion-bonded Interfaces

The report covers exploratory development of nondestructive testing techniques for solid-state diffusion-bonded parts. A literature survey describes the current inspection practices employed on diffusion-bonded laminates and the nature of the interface and bond properties. Test specimens of titanium, columbium, and TD-nickel were prepared for evaluating various test methods. The specimens provided a range of thicknesses and varying degree of bond quality as determined by mechanical property tests. In addition, a number of diffusion-bonded specimens were supplied by the Air Force. Conventional ultrasonic techniques and recently developed selective interface inspection techniques clearly indicate bond conditions where these vary from a no-bond condition to substandard bonds. A number of methods show potential correlation between a quantitative expression of bond quality such as shear or tensile strength. These methods include longitudinal and shear wave velocity, ultrasonic attenuation, and vibration analysis. (Author).

Abstracts of Active Contracts

Abstracts of AF Materials Laboratory Reports