An investigation was made, of the diffusion of H in Ni-Fe alloys, by measuring the evolution rate of the gas, to a vacuum, from specimens which were initially saturated with H. The alloys used contained a maximum of 0.01%C and a maximum of 0.005%S (tables 71 and 72). It was reported that both the short- and long-range order of Fe-Ni alloys influenced the diffusion of H.
Diffusion of Hydrogen in FCC Alloys of Nickel with Iron. R.Dus, M.Smialowski: Acta Metallurgica, 1967, 15, 1611-6
Table 76Hydrogen Diffusion Parameters for JBK-75 in Various Conditions
Treatment | Do (m2/s) | E (kJ/mol) |
cold-rolled to 75% deformation | 4.17 x 10-7 | 50.23 |
ST (980C, 1h), WC | 1.81 x 10-7 | 45.74 |
ST (980C, 1h), WC, aged (740C, 4h), AC | 2.40 x 10-7 | 47.21 |
ST (980C, 1h), WC, aged (740C, 8h), AC | 3.24 x 10-7 | 49.18 |
ST (980C, 1h), WC, aged (740C, 16h), AC | 5.99 x 10-7 | 51.99 |
ST: solution-treated, WC: water-cooled, AC: air-cooled