Mechanical properties of various alloys in hydrogen. Final report

Technical Report · Sun Jun 01 04:00:00 EDT 1986

OSTI ID:6658221

Weeks, N L; Mucci, J

Notch tensile tests were conducted to determine the tensile strength of experimental alloys proposed for use in a pressurized gaseous hydrogen environment. The experimental alloys were processed and supplied by the Marshall Space Flight Center. They were supplied in four groups: nickel-base alloys, iron-base alloys, beryllium alloys, and the single-crystal alloy PWA 1480 in seven crystallographic orientations. Testing of the nickel-base, iron-base, and beryllium alloys established the comparative ambient temperature notch tensile strength in 34.5 MPa (5000 psig) gaseous hydrogen environment. After the test results were documented and reported, the test specimens were returned for evaluation. Testing of the single-crystal alloy, PWA 1480, established the notched tensile strength for the various crystallographic orientations in 34.5 MPa (5000 psig) gaseous helium and hydrogen environments at 871 C (1600 F). Strengths established in hydrogen were compared to those in helium to determine environmental degradation due to hydrogen. For the nickel-base alloys, iron-base alloys, and the beryllium alloys, environmental degradation could not be established as no helium environment tests were conducted.

• Research Organization: United Technologies Corp., East Hartford, CT (USA)
• OSTI ID: 6658221
• Report Number(s): N-87-11889; NASA-CR-178874; NAS-1.26:178874; FR-19269
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
AMBIENT TEMPERATURE
BERYLLIUM ALLOYS
CRYSTALLOGRAPHY
CRYSTALS
DATA
ELEMENTS
EXPERIMENTAL DATA
FLUIDS
GASES
HELIUM
HIGH PRESSURE
HYDROGEN
INFORMATION
IRON ALLOYS
IRON BASE ALLOYS
MECHANICAL PROPERTIES
MONOCRYSTALS
NICKEL ALLOYS
NICKEL BASE ALLOYS
NONMETALS
NUMERICAL DATA
RARE GASES
TENSILE PROPERTIES