Accession Number : AD0917984

Title :   Process Development and Characterization of Chemical Vapor Deposited Tungsten for Gun Barrel Applications.

Descriptive Note : Final rept. Dec 71-Sep 73,

Corporate Author : PHILCO-FORD CORP NEWPORT BEACH CA AERONUTRONIC DIV

Personal Author(s) : Harlow, Richard A. ; Corn, David L.

Report Date : OCT 1973

Pagination or Media Count : 69

Abstract : A 20-month program was conducted to develop improved chemical vapor deposition (CVD) processes for applying tungsten to the bores of gun barrels, and further, to characterize the physical and mechanical properties of the CVD tungsten as deposited. Conventional and high strain-rate tensile and compression tests were conducted on CVD tungsten as deposited on 4150 steel at temperatures of -65 F, ambient, and 200 F. Density, thermal expansion, and thermal conductance measurements were also made. Barrel materials of 4150 steel, CG-27, L-605, 718, and Pyromet X-15 were investigated. Based on test firings, acceptable CVD tungsten adherence was demonstrated on 4150, but the other four alloys revealed only marginal quality. Fourteen .220 Swift/MG-3 tests barrels of the five materials were fabricated and delivered to the Air Force. (Author)

Descriptors :   *TUNGSTEN), (*GUN BARRELS, VAPOR DEPOSITION), (*VAPOR DEPOSITION, (*LININGS, GUN BARRELS), STEEL, CHEMICALS, PHYSICAL PROPERTIES, MECHANICAL PROPERTIES, TENSILE PROPERTIES, DENSITY, THERMAL EXPANSION, THERMAL CONDUCTIVITY, EROSION, FIRING TESTS(ORDNANCE), NICKEL ALLOYS, ELECTROLESS PLATING, COMPRESSIVE PROPERTIES, RIFLING, HYDROGEN, ARGON, DILUTION, COBALT ALLOYS.

Subject Categories : Fabrication Metallurgy
      Guns

Distribution Statement : APPROVED FOR PUBLIC RELEASE