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Accession Number:
AD0754478
Title:
Development of Ribbon-Reinforced Titanium Matrix Composites.
Descriptive Note:
Final rept. 16 Apr-15 Oct 72,
Corporate Author:
NATIONAL RESEARCH CORP CAMBRIDGE MASS
Report Date:
1972-11-01
Pagination or Media Count:
42.0
Abstract:
Boron carbide-ribbon reinforced titanium composites were fabricated by modifying a lamination process comprising the formation of B4C-Ti layers 0.001 inch in depth and diffusion bonding laminate assemblies at 700C and 8000-10,000 psi pressure for two hours in vacuum. Composites containing uniaxially aligned arrays of B4C ribbon elements with cross-section ratios varying from 50 to 1000 demonstrated improved transverse mechanical properties compared to equivalent fiber-reinforced products. Transverse elastic modulus and fracture stress modulus values varying from 75-100 percent of corresponding axial values were measured depending on ribbon geometry. The experimental results were in good agreement with data derived from theoretical analysis.
Distribution Statement:
APPROVED FOR PUBLIC RELEASE