The diffusivity of N in a 25Ni-20%Cr austenitic stainless steel was deduced by using a flux measurement technique. The values obtained were confirmed by means of gravimetric measurements. At 1200 to 1325K, the diffusion coefficients were given by:
D (cm2/s) = 2.18 x 104 exp[-316000/R(J.molK)T]
R.Hales, A.C.Hill: Metal Science, 1977, 11[7], 241-4
Table 160
Ternary Interdiffusion Coefficient, DNiCrFe, for the Fe-Ni-Cr System at 1223K
Ni (wt%) | Cr (wt%) | Value (m2/s) |
70.3 | 17.8 | -1.1 x 10-16 |
71.3 | 19.6 | -2.7 x 10-16 |
64.8 | 5.9 | -2.0 x 10-17 |
continued
Table 160 (continued)
Ternary Interdiffusion Coefficient, DNiCrFe, for the Fe-Ni-Cr System at 1223K
Ni (wt%) | Cr (wt%) | Value (m2/s) |
66.6 | 11.6 | -5.4 x 10-16 |
75.9 | 23.6 | -2.1 x 10-16 |
42.0 | 23.0 | -2.4 x 10-16 |
54.0 | 24.0 | 1.9 x 10-16 |
83.6 | 13.2 | -2.10 x 10-15 |
91.9 | 1.8 | -2.5 x 10-16 |
90.5 | 3.1 | -1.20 x 10-15 |
58.1 | 24.2 | 8.6 x 10-16 |
63.7 | 24.5 | 3.7 x 10-16 |
67.4 | 24.4 | 2.67 x 10-15 |
75.4 | 24.4 | 5.27 x 10-15 |
54.8 | 25.9 | 4.1 x 10-16 |
46.5 | 9.0 | -3.4 x 10-16 |
49.2 | 15.3 | -5.0 x 10-16 |
45.0 | 28.4 | -1.10 x 10-15 |
57.0 | 28.8 | 4.1 x 10-16 |
59.0 | 30.0 | 1.33 x 10-15 |
42.0 | 9.8 | -1.12 x 10-15 |
35.4 | 18.5 | -1.80 x 10-15 |
42.4 | 29.6 | -5.6 x 10-16 |
43.9 | 9.5 | -1.50 x 10-15 |
43.4 | 16.6 | -8.7 x 10-16 |
45.1 | 5.8 | -2.10 x 10-15 |
42.3 | 28.5 | -3.9 x 10-16 |
44.7 | 4.5 | 2.5 x 10-16 |
28.8 | 22.7 | 3.9 x 10-16 |