The diffusion of 14C in the ferrite phase of the 5.5Mo-0.91wt%C alloy steel was studied by using a radio-isotope method. The results for 590 to 710C could be described by:

D (cm2/s) = 5.1 x 102 exp[-45.7(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 122

Diffusion of C in Fe-1.1at%Mo at 1000C

 

C (at%)

D (cm2/s)

0.6

2.5 x 10-7

1.1

2.6 x 10-7

2.2

2.8 x 10-7