Accession Number : AD0846068

Title :   Effects of Hydrogen Environments on Columbium and Tantalum Alloys.

Descriptive Note : Final rept. 1 Feb 67-31 Jul 68,

Corporate Author : ROCKETDYNE CANOGA PARK CA

Personal Author(s) : Bentle, G. ; Chandler, W. T.

Report Date : SEP 1968

Pagination or Media Count : 126

Abstract : The effect of water vapor/hydrogen environments on the mechanical properties of tantalum and the tantalum-10 weight percent tungsten alloy (Ta-10W) was determined by conducting tensile tests in these environments at 1-atmosphere pressure and temperatures from 400 to 1500 F. The test conditions were chosen to simulate, except for pressure, those conditions to which materials would be exposed in hydrogen-oxygen-fueled rocket or ramjet thrust chambers. Two H2O/H2 mixture ratios, with nominal values of 3 and 1, corresponding to the two limits currently used in hydrogen/oxygen engine operation, were employed during these tests. These mixture ratios are on a volume basis and correspond, respectively, to oxygen/hydrogen weight ratios of approximately 6 and 4. (Author)

Descriptors :   (*TANTALUM ALLOYS, ENVIRONMENTAL TESTS), (*NIOBIUM ALLOYS, ENVIRONMENTAL TESTS), TANTALUM, NIOBIUM, TUNGSTEN ALLOYS, MOLYBDENUM ALLOYS, VANADIUM ALLOYS, ZIRCONIUM ALLOYS, HYDROGEN, WATER VAPOR, TENSILE PROPERTIES, TRANSITION TEMPERATURE, SOLUBILITY, SORPTION, REACTION KINETICS, ROCKET ENGINES.

Subject Categories : Metallurgy and Metallography
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE