The diffusion of 14C in the ferrite phase of the 5.5W-0.83wt%C alloy steel was studied by using a radio-isotope method. The results for 590 to 710C could be described by:

D (cm2/s) = 1.2 x 102 exp[-42.0(kcal/mol)/RT]

The diffusion parameters depended upon whether or not allowance was made for the carbide phase.

I.K.Kupalova, S.V.Zemskii: Izvestia Akademii Nauk, 1974, 4, 123-5

 

Table 206

Diffusion Parameters for H in Fe90Zr10

 

Sample

Do (m2/s)

E (eV)

100% amorphous

1 x 10-6

0.55

90% amorphous

1 x 10-6

0.56

50% amorphous

4 x 10-8

0.44