Accession Number:

AD0818082

Title:

EVALUATION OF THE STRESS CORROSION SUSCEPTIBILITY OF TITANIUM SHEET ALLOYS COATED WITH HIGH TEMPERATURE SEALANTS.

Descriptive Note:

Technical rept.,

Corporate Author:

TRW EQUIPMENT LABS CLEVELAND OH

Report Date:

1967-05-01

Pagination or Media Count:

64.0

Abstract:

Screening tests on self-stressed beam specimens were conducted using cyclic temperature exposures to determine the stress-corrosion susceptibility of titanium alloys in contact with high temperature fuel tank sealants. Fluorinated Viton type sealants produced a relatively high degree of stress-corrosion attack while the titanium alloys were relatively unaffected by a polyimide sealant. The duplex annealed Ti-8Al-1Mo-1V alloy and the Ti-6Al-4V alloy showed the greatest resistance to stress-corrosion attack while the beta alloy Ti-13V-11Cr-3Al was the most susceptible. Precracked specimens under static load and constant temperature were also used to evaluate stress-corrosion susceptibility. Although the relative material ratings obtained with the precracked specimens were comparable to the self-stressed specimen, the failures in precracked specimens occurred in substantially shorter test times. Author

Subject Categories:

  • Properties of Metals and Alloys

Distribution Statement:

APPROVED FOR PUBLIC RELEASE