SST Technology Follow-on Program-Phase II. Development and Evaluation of the Aluminum-Brazed Titanium System. Volume II. Process R and D.
Abstract
Aluminum-brazed titanium honeycomb sandwich developed for the SST prototype had specific process limits primarily due to lack of development time available. Designs were limited to light-gauge, constant-thickness panels with minimum core densities of 5 lb/cu ft. Process research and development work was conducted on the DOT/SST Phase II technology follow-on program to (a) extend the process to lower core densities and greater core depths, (b) investigate new braze alloys, core materials and configurations, (c) refine cleaning procedures, (d) develop techniques for improving quality of faying-surface brazements, (e) establish procedures for post-braze welding of sandwich assemblies, (f) develop brazing of curved and wedge configurations, and (g) determine feasibility of fabricating acoustic sandwich structure. Results of this program provide a more comprehensive understanding of process criteria for aluminum-brazed titanium honeycomb sandwich structure. Procedures were established for fabricating sandwich panels with core densities down to 1.6 lb/cu ft and core depths up to 3 in. A unique rotating retort method was utilized for curved configurations. Techniques were developed for wedge-shape configurations, faying-surface braze joints, and post-braze welding. The feasibility of single and multilayer acoustic sandwich was demonstrated. Processes established by this program were utilized for fabricating test hardware for related development work. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1974
- Accession Number
- AD0920795
Entities
People
- D. T. Lovell
- R. R. Boyer
- S. D. Elrod
Organizations
- Boeing