Accession Number : AD0775466

Title :   Nondestructive Testing Techniques for Diffusion Bonded Titanium Structures.

Descriptive Note : Final rept. 1 Dec 72-1 Oct 73,

Corporate Author : GENERAL DYNAMICS FORT WORTH TEX CONVAIR AEROSPACE DIV

Personal Author(s) : Regalbuto,John A.

Report Date : DEC 1973

Pagination or Media Count : 130

Abstract : This report describes the establishment of nondestructive testing techniques for diffusion bonded structures fabricated from Ti-6Al-4V sheet and forgings. Ultrasonic shear waves, radio frequency and signal-averaged pulse-echo techniques, x-ray, fluorescent penetrant, and blue-etch-anodize were used to inspect a series of diffusion bonded defect specimens. Analysis of NDT, mechanical property, and fractographic data indicated that shear wave inspection of the sheet material could be correlated with the observed decrease in fatigue life with deflect concentration. Shear strength of the sheet specimens was not affected by the presence of the internal defects to any measurable degree. Grain structure noise limited inspectability of the small (0.006-in. dia.) defects in the diffusion bonded forging. (Author)

Descriptors :   *Titanium alloys, *Nondestructive testing, *Diffusion bonding, Aluminum alloys, Vanadium alloys, Ultrasonic tests, X rays, Etching, Fractography, Defects(Materials), Fatigue(Mechanics)

Subject Categories : Metallurgy and Metallography
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE