The residual activity technique was used to study the self-diffusion of 59Fe in Fe-Mo alloys which also contained 0.005C, 0.02Mn, 0.03Si and 0.008wt%P/S (table 123). The data for the various compositions could be described by:

0.54wt%:     D (cm2/s) = 4.600 x 103 exp[-75.4(kcal/mol)/RT]

1.06wt%:     D (cm2/s) = 1.100 x 105 exp[-82.5(kcal/mol)/RT]

1.50wt%:     D (cm2/s) = 4.100 x 104 exp[-80.3(kcal/mol)/RT]

2.50wt%:     D (cm2/s) = 2.700 x 103 exp[-80.3(kcal/mol)/RT]

The results indicated an effect of magnetic ordering upon the diffusion of Fe.

J.Kucera, B.Million, J.Ruzicková, A.Jakobova, V.Foldyna: Kovove Materialy, 1973, 11[5], 456-61