Continuous Seam Diffusion Bond Titanium Spar Evaluation.
Abstract
The objectives of this program were establishment of a technology to fabricate helicopter titanium main rotor blade spars cut from sheet material and joined by continuous seam diffusion bonding (CSDB) and the eventual application of this technology in the manufacturing of various components at reduced overall cost. The effects of different thermal treatments after bonding were determined by tensile and fatigue testing of small test specimens fabricated from titanium sheet flat panels joined by CSDB. Three 9-foot long spar sections were then fabricated, and two were tested in fatigue. The results indicate that continuous seam diffusion bonding has fatigue strength characteristics as good as, or better than, present fusion welded main rotor blade spar specimens and should be further evaluated for this application. (Modified author abstract)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1974
- Accession Number
- AD0780029
Entities
People
- John J. Lucas
- Maron J. Bonassar
Organizations
- United Aircraft Corporation