STP543: Various Mechanical Tests Used to Determine the Susceptibility of Metals to High-Pressure Hydrogen

    Harris, JA
    Senior project materials testing engineer and general supervisor, Applied Mechanics Section of the Materials Development Laboratory, Florida Research and Development Center, Pratt & Whitney Aircraft, West Palm Beach, Fla.

    VanWanderham, MC
    Senior project materials testing engineer and general supervisor, Applied Mechanics Section of the Materials Development Laboratory, Florida Research and Development Center, Pratt & Whitney Aircraft, West Palm Beach, Fla.

    Pages: 23    Published: Jan 1974


    Abstract

    The use of hydrogen as a rocket fuel has been successfully established; however, it has also been established that many metals are degraded in one or more of their properties by environmental gaseous hydrogen. The degree of degradation may range from slight to extreme, depending on the metal being analyzed and the type of test or tests used. Many important variables, such as environment, stress, temperature, and time must be considered in selecting the test to be used to determine the susceptibility to gaseous hydrogen. This report will discuss several different types of tests, such as: (1) tensile (smooth and notched), (2) strain-controlled, low-cycle fatigue, (3) high-cycle fatigue, (4) creep-rupture, and (5) fracture toughness, used to determine degradation of specific material properties and enable general observations in regard to the susceptibility of various materials to hydrogen degradation.

    Keywords:

    hydrogen embrittlement, degradation, mechanical properties, smooth tensile, notched tensile, low-cycle fatigue, high-cycle fatigue, creep rupture strength, fracture toughness, helium gas, hydrogen gas, elevated temperature, iron containing alloys, nickel containing alloys, titanium containing alloys, susceptibility


    Paper ID: STP38938S

    Committee/Subcommittee: F07.04

    DOI: 10.1520/STP38938S


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