The diffusivity of 48V in ferritic Fe-Cr and Fe-Cr-C alloys, and in 2 commercial 8%Cr ferritic steels, was determined by using serial sectioning methods at 743 to 1123K (table 68). The diffusivities along high-diffusivity paths were explained in terms of the interaction of the diffusant with carbide particles.
J.Čermák, J.Ruzicková, A.Pokorná: Acta Materialia, 1996, 44[12], 5007-19
Table 68
Grain Boundary Diffusion of 48V in Fe-Cr Alloys
Cr (wt%) | Temperature (K) | D (m3/s) |
8.07 | 1103 | 1.18 x 10-20 |
8.07 | 1043 | 1.79 x 10-21 |
8.07 | 983 | 3.80 x 10-22 |
8.07 | 923 | 1.68 x 10-23 |
8.07 | 863 | 1.70 x 10-24 |
8.07 | 803 | 8.20 x 10-26 |
8.07 | 743 | 4.09 x 10-26 |
10.18 | 1103 | 6.99 x 10-21 |
10.18 | 1043 | 7.36 x 10-22 |
10.18 | 983 | 4.04 x 10-22 |
10.18 | 923 | 1.89 x 10-23 |
10.18 | 863 | 3.71 x 10-24 |
10.18 | 803 | 1.59 x 10-25 |
10.18 | 743 | 2.83 x 10-26 |
12.25 | 1103 | 3.58 x 10-21 |
12.25 | 1043 | 8.57 x 10-22 |
12.25 | 983 | 4.15 x 10-22 |
12.25 | 923 | 5.98 x 10-24 |
12.25 | 863 | 1.28 x 10-24 |
12.25 | 803 | 8.66 x 10-26 |
12.25 | 743 | 1.91 x 10-26 |
8.03 | 983 | 1.89 x 10-22 |
8.03 | 923 | 2.97 x 10-23 |
8.03 | 863 | 4.44 x 10-24 |
8.03 | 803 | 1.25 x 10-25 |
8.03 | 743 | 1.95 x 10-26 |
8.36 | 983 | 5.55 x 10-23 |
8.36 | 923 | 7.68 x 10-24 |
continued
Table 68 (continued)
Grain Boundary Diffusion of 48V in Fe-Cr Alloys
Cr (wt%) | Temperature (K) | D (m3/s) |
8.36 | 863 | 4.78 x 10-25 |
8.36 | 803 | 7.48 x 10-26 |
8.50 | 983 | 5.14 x 10-23 |
8.50 | 923 | 5.71 x 10-24 |
8.50 | 863 | 9.14 x 10-25 |
8.50 | 803 | 4.30 x 10-26 |