Accession Number : AD0871446

Title :   Advanced Fuel Systems for Ramjet-Powered Vehicles. Material Screening Report.

Descriptive Note : Summary rept. 30 Jun-31 Oct 69,

Corporate Author : ATLANTIC RESEARCH CORP ALEXANDRIA VA

Personal Author(s) : Sargent, Donald H. ; Bielawski, Cedric

Report Date : DEC 1969

Pagination or Media Count : 30

Abstract : A 4-month materials screening effort was conducted to document the basic compatibility of various materials potentially useful in ramjet fuel system components with the dense hydrocarbon RJ-5 (Shelldyne H) fuel. The candidate materials included eight metals (four steels, two aluminums, and two titaniums), and eight nonmetals (five potential elastomeric bladder materials and three plastics). The screening tests were immersion tests at both room temperature and at 160 F, U-bend stress corrosion tests (for the metals), and permeability tests (for the bladder materials). The immersion test specimens were evaluated by changes in appearance of both the materials and the fuel; by volume and weight changes; by changes in tensile strength; and by changes in hardness. None of the eight metals has shown any effect of contact with Shelldyne H. Of the five candidate bladder materials, Viton and a reinforced Viton were the most stable. Nitrile with no reinforcing was significantly degraded. Ethylene propylene terpolymer was grossly incompatible with the fuel. Of the three plastics tested, nylon, Teflon, and silicone rubber, only the latter exhibited any effect of immersion. (Author, modified-PL)

Descriptors :   (*RAMJET ENGINES, FUEL SYSTEMS), (*FUEL SYSTEMS, MATERIALS), STRESS CORROSION, STRUCTURAL PROPERTIES, STAINLESS STEEL, TITANIUM ALLOYS, ALUMINUM ALLOYS, ELASTOMERS, HEAT RESISTANT PLASTICS.

Subject Categories : Properties of Metals and Alloys
      Plastics
      Elastomers and Rubber
      Jet and Gas Turbine Engines

Distribution Statement : APPROVED FOR PUBLIC RELEASE