A New Method for Studying Thermal Desorption of Hydrogen from Metals Based on Internal Friction Technique
Many hydrogenated pure metals and industrial alloys with FCC lattice show a distinct internal friction peak above room temperature caused by the thermal desorption of hydrogen. Based on these observations, a new method for studying the hydrogen diffusivity and the interaction of hydrogen with lattice defects is proposed for the temperature range of 250-500 K. The desorption origin of the peak was studied in detail in hydrogen-charged Inconel 600 alloys with different carbon contents. The peak was shown to possess transient and non-relaxation nature. In some cases, a fine structure of the peak caused by hydrogen traps can be observed. A theoretical model of the thermal desorption effects on the losses of mechanical energy, i.e., internal friction, in metals is developed.
Bibliographic Reference: Oral Report delivered at the 5th International Workshop of Hydrogen Isotopes in Solids, hosted at Stockholm, (SE), 17-19 May 2000
Record Number: 200012995 / Last updated on: 2001-01-24
Original language: en
Available languages: en