The grain boundary diffusivities of 48V in binary Fe-Cr alloys with 8 to 12wt%Cr (table 70), in a ternary Fe-8Cr-0.17wt%C alloy and in 2 modifications of 8%Cr ferritic steel were determined by using serial sectioning methods at temperatures ranging from 743 to 1103K. It was found that varying the Cr concentration from 8 to 12wt% did not affect the grain boundary diffusivity. The diffusivity of V in steels of commercial purity was about 4 times slower than in pure alloys.
J.Čermák, J.Ruzicková, A.Pokorná: Scripta Materialia, 1996, 34[3], 429-33
Table 70
Grain Boundary Diffusivity of V in Fe-Cr Alloys
Temperature (K) | Cr (wt%) | sD (m3/s) |
1103 | 8.07 | 2.05 x 10-20 |
1103 | 10.18 | 9.04 x 10-21 |
1103 | 12.25 | 3.92 x 10-21 |
1043 | 8.07 | 5.00 x 10-22 |
1043 | 10.18 | 6.74 x 10-22 |
Table 70 (continued)
Grain Boundary Diffusivity of V in Fe-Cr Alloys
Temperature (K) | Cr (wt%) | sD (m3/s) |
1043 | 12.25 | 4.57 x 10-22 |
983 | 8.07 | 5.94 x 10-22 |
983 | 10.18 | 5.86 x 10-22 |
983 | 12.25 | 2.39 x 10-22 |
983 | 8.03 | 2.01 x 10-22 |
923 | 8.07 | 2.64 x 10-23 |
923 | 10.18 | 1.51 x 10-23 |
923 | 12.25 | 5.99 x 10-24 |
923 | 8.03 | 3.30 x 10-23 |
923 | 8.36 | 9.87 x 10-24 |
923 | 8.50 | 6.77 x 10-24 |
863 | 8.07 | 1.61 x 10-24 |
863 | 10.18 | 3.51 x 10-24 |
863 | 12.25 | 1.21 x 10-24 |
863 | 8.03 | 3.53 x 10-24 |
863 | 8.36 | 4.52 x 10-25 |
863 | 8.50 | 8.64 x 10-25 |
803 | 8.07 | 7.47 x 10-26 |
803 | 10.18 | 1.45 x 10-25 |
803 | 12.25 | 7.89 x 10-26 |
803 | 8.03 | 1.14 x 10-25 |
803 | 8.36 | 6.82 x 10-26 |
803 | 8.50 | 3.93 x 10-26 |
743 | 8.07 | 3.37 x 10-26 |
743 | 10.18 | 2.96 x 10-26 |
743 | 12.25 | 1.07 x 10-26 |
743 | 8.36 | 2.59 x 10-26 |