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Magnetic relaxation studies of the motion of hydrogen and deuterium in iron

Journal Article · · Acta Metall.; (United States)
The motion of hydrogen and deuterium in iron at low temperatures was studied using magnetic relaxation techniques. A number of relaxations were observed which could be interpreted as due to H(D) mobility in various configurations. Relaxations at about 29, 34, 39 K (75, 93, 104 K) were identified as the reorientation motion of H--H (D--D) clusters while at 52 K (122 K) the relaxation was due to long range diffusion of H--H (D--D) clusters. Impurity trapping of H by C and N was studied and values for the C--H and N--H binding enthalpies were obtained. The motion of H around a C trapping site was observed to give a low temperature relaxation, the kinetics of which obeyed the Flynn--Stoneham tunneling theory. Trapping of H by dislocations was also observed and a H cold work peak was studied.
Research Organization:
Univ. of Illinois, Urbana
OSTI ID:
6427910
Journal Information:
Acta Metall.; (United States), Journal Name: Acta Metall.; (United States) Vol. 26:7; ISSN AMETA
Country of Publication:
United States
Language:
English