Accession Number:

ADA248372

Title:

Surface Residual Stress Analysis of Metals and Alloys

Descriptive Note:

Final rept. 4 Apr 1991-4 Feb 1992

Corporate Author:

REINHART AND ASSOCIATES AUSTIN TX

Report Date:

1992-02-04

Pagination or Media Count:

31.0

Abstract:

The critically refracted longitudinal wave CRLW technique was used to establish how feasible it is to measure stress changes at the surface and interior of a material, in particular naval airframe metals such as Ti-6AI-4V, 6061-T651 Aluminum, and 4340 steel. The CRLW propagation characteristics were found to be potentially practical if use of the 2P wave is implementable to have it as a reference wave. The CRLW technique was effective in detecting stress gradients in bent plates by measuring the acoustoelastic effect on the longitudinal wave velocity. The CRLW technique was applied in the range of 1.0 to 10 MHz and the expected longitudinal wave velocity changes followed the expected trends in the A16061-T651 and 4340 steel plates 0.50 inch thick. The longitudinal wave velocity changes measured in the Ti-6Al-4V plate did not follow the expected trends probably due to its thickness 0.25 inch.

Subject Categories:

  • Inorganic Chemistry
  • Metallurgy and Metallography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE