Accession Number:

AD0920796

Title:

SST Technology Follow-on Program-Phase II. Development and Evaluation of the Aluminum-Brazed Titanium System. Volume III. Scale-Up Technology.

Descriptive Note:

Final rept. on Task 1,

Corporate Author:

BOEING COMMERCIAL AIRPLANE CO SEATTLE WA

Personal Author(s):

• Taylor, R. Q.
• Elrod, S. D.
• Lovell, D. T.

Report Date:

1974-05-01

Pagination or Media Count:

121.0

Abstract:

Aluminum-brazed titanium honeycomb sandwich panels for the SST prototype were limited to light-gage face skins and constant panel depths. A major objective of the Phase II DOTSST technology follow-on program was to expand the technology for design and fabrication of structural brazed panels. Specific objectives were a demonstrate practicality of producing panels in a broader range of configuration and load-carrying capacity, b extend capabilities for wedge structure, and c develop ability to build a complex design flight service component. Techniques were developed in this program to braze panels to final geometry net size. One hundred thirty panel brazements were completed, ranging up to 32 in. wide by 92 in. long, with nominal skin gages from 0.016 to 0.150 in., and depths up to 3 in. Manufacturing problems with panel edge contamination, braze voids and faying-surface joints were resolved satisfactorily. Objectives were achieved by successful fabrication and test of a simulated wing panels capable of sustaining 30,000 lbin. end loads, b wedge shape panel assemblies, and C airplane control surface hardware suitable for service testing. Fabrication technology for single- and double-layer acoustic structure was also demonstrated. Recommendations are provided for further improvement in full-scale panel design and fabrication. Author

Descriptors:

• *TITANIUM ALLOYS
• *BRAZING ALLOYS
• *BRAZING
• *SUPERSONIC TRANSPORT AIRCRAFT
• *ALUMINUM ALLOYS
• AIRCRAFT PANELS
• GEOMETRIC FORMS
• WEDGES
• AIRFRAMES
• NOISE REDUCTION
• JOINTS
• SPOT WELDS
• SPOILERS
• WINGS
• CONTAMINANTS
• TITANIUM COMPOUNDS
• ALUMINUM COMPOUNDS
• HONEYCOMB CORES
• HONEYCOMB STRUCTURES
• NONDESTRUCTIVE TESTING

Subject Categories:

• Transport Aircraft
• Metallurgy and Metallography
• Fabrication Metallurgy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE