By using electron probe microanalysis, the diffusion of V in 18Mn-3.6wt%Cr steel was measured at 1173 to 1423K. The diffusion data could be described by:

D (cm2/s) = 3.1 x 100 exp[-275.8(kJ/mol)/RT]

B.Million, K.Ciha, J.Krumpos, K.Stransky: Kovove Materialy, 1976, 14[6], 636-50

 

Table 174

Diffusion Coefficients for 57Ni in Fe-20Ni-15Cr-1.45at%Si

 

Temperature (C)

Atmosphere/Grain Size

D (cm2/s)

1363

He/fine

6.63 x 10-10

1244

Ar/fine

9.48 x 10-11

1168

vacuum/fine

3.79 x 10-11

1108

Ar/fine

6.22 x 10-12

1068

He/coarse

4.72 x 10-12

963

vacuum/coarse

4.33 x 10-13