Accession Number:

AD0902465

Title:

SST Technology Follow-On Program Phase I. Creep and Corrosion Testing, Aluminum Brazed Titanium Honeycomb Sandwich.

Descriptive Note:

Final rept. on Task 1,

Corporate Author:

BOEING COMMERCIAL AIRPLANE CO SEATTLE WA

Personal Author(s):

Report Date:

1972-07-15

Pagination or Media Count:

43.0

Abstract:

This document describes aluminum-brazed titanium honeycomb creep-rupture and corrosion tests conducted on the DOTSST phase I follow-on program. The work consisted of continuation of the creep and corrosion testing initiated on the SST prototype program plus additional new corrosion tests. The creep-rupture tests were conducted on aluminum-brazed honeycomb panel specimens exposed at 450 and 600 F. The corrosion program included 1 aircraft service experience-about 2 years, 2 accelerated laboratory tests, i.e., salt spray, and 3 fundamental studies such as electro-potential measurements. The flatwise tension creep-rupture strength appears to be adequate for structural applications to the highest temperature evaluated 600 F. The indicated 10,000-hr creep-rupture strength at 450 and 600 F, based on tests conducted to date, is approximately 750 and 350 psi, respectively, for 0.25-in.-square cell size with 0.002-in. cell wall thickness. Corrosion resistance was shown to exceed all expectations and was essentially equivalent to 3003 aluminum sheet. No significant galvanic acceleration from the bimetal coupling with titanium was detected. Aircraft service experience up to about 2 years showed no corrosion penetration of the honeycomb panels. Recommendations for future work are included. Author

Subject Categories:

  • Transport Aircraft
  • Properties of Metals and Alloys

Distribution Statement:

APPROVED FOR PUBLIC RELEASE