By using the Gruzin radioactive tracer technique, the tracer diffusion coefficients of 59Fe in Fe-18.5Cr-9.5%Ni (0.027%C, 0.6%Si) were studied at 800 to 1200C. The results could be described by:

bulk:     D (cm2/s) = 2.5 x 10-3 exp[-52(kcal/g-atom)/RT]

grain-boundary:     D (cm3/s) = 1.6 x 10-11 exp[-17(kcal/g-atom)/RT]

D.Marchive, D.Duc, D.Treheux, P.Guiraldenq: Comptes Rendus Hebdomaires des Seances de l’Academie des Sciences, Serie C, 1975, 280[1], 25-8

 

Table 88

Bulk and Grain Boundary 59Fe Diffusivities in

Fe-Ni-19wt%Cr Alloys at 900C

 

Ni (wt%)

Dv (cm2/s)

Dgb (cm3/s)

10

6.6 x 10-13

1.3 x 10-14

30

4.0 x 10-13

5.2 x 10-15

45

8.0 x 10-13

2.2 x 10-15

55

1.1 x 10-12

6.0 x 10-15

65

9.5 x 10-13

1.4 x 10-15

75

2.7 x 10-13

9.0 x 10-16