The role of grain boundaries in hydrogen diffusion in metals at 25 C

Technical Report · Tue Jun 01 00:00:00 EDT 1993

OSTI ID:6188603

Danford, M D

The effect of grain size on hydrogen diffusion at 25 C was examined for 4340 steel (body-centered cubic) and for Inconel 718 (face-centered cubic). It was found that the effect of grain size is important for body-centered cubic structures, but plays a much less important role in face centered cubic structures. Accurate measurements of hydrogen desorption coefficients during hydrogen desorption show that these are not greatly different for both types of structures.

• Research Organization: National Aeronautics and Space Administration, Huntsville, AL (United States). George C. Marshall Space Flight Center
• OSTI ID: 6188603
• Report Number(s): N-93-29043; NASA-TM-108407; NAS-1.15:108407
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
HYDROGEN
DESORPTION
DIFFUSION
INCONEL 718
GRAIN BOUNDARIES
STAINLESS STEELS
BCC LATTICES
FCC LATTICES
GRAIN SIZE
TEMPERATURE RANGE 0273-0400 K
ALLOY-NI53CR19FE19NB5MO3
ALLOYS
ALUMINIUM ADDITIONS
ALUMINIUM ALLOYS
CHROMIUM ALLOYS
CORROSION RESISTANT ALLOYS
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CUBIC LATTICES
ELEMENTS
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
HIGH ALLOY STEELS
INCONEL ALLOYS
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS
MICROSTRUCTURE
MOLYBDENUM ALLOYS
NICKEL ALLOYS
NICKEL BASE ALLOYS
NIOBIUM A
NONMETALS
SIZE
SORPTION
STEELS
TEMPERATURE RANGE
360105* - Metals & Alloys- Corrosion & Erosion