Accession Number : AD0843914

Title :   Exploratory Development of Nondestructive Testing Techniques for Diffusion Bonded Interfaces.

Descriptive Note : Summary technical rept. 31 Jul 67-31 Jul 68,

Corporate Author : NORTH AMERICAN ROCKWELL CORP LOS ANGELES CA LOS ANGELES DIV

Personal Author(s) : Martin, George ; Moore, John F.

Report Date : SEP 1968

Pagination or Media Count : 187

Abstract : 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)

Descriptors :   *NONDESTRUCTIVE TESTING), (*BONDED JOINTS, ULTRASONIC RADIATION, RADIOGRAPHY, ELECTROMAGNETIC RADIATION, VIBRATION, DIFFUSION BONDING, INTERFACES, LAMINATES, TITANIUM ALLOYS, ALUMINUM ALLOYS, VANADIUM ALLOYS, ZIRCONIUM ALLOYS, TUNGSTEN ALLOYS, NICKEL, METAL JOINTS.

Subject Categories : Metallurgy and Metallography
      Couplers, Fasteners, and Joints
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE