On the basis of measurements of zero creep in fine. wires of Ti-5Al-2.5wt%Sn at 1377 to 1583K, the self-diffusion coefficient (table 296) was found to be described by:
D(m2/s) = 5.7 x 10-6 exp[-182(kJ/mol)/RT]
The results of the study were in reasonable agreement with data arising from similar studies of Ti and Ti alloys.
T.A.Roth,, W.D.Henning: Materials Science and Engineering, 1985, 71, 187-94
Table 295
Diffusivity of 44Ti in TiAl
Temperature (K) | Direction | D (m2/s) |
1307 | [001] | 2.65 x 10-16 |
1307 | ||[001] | 3.70 x 10-17 |
1277 | [001] | 1.29 x 10-16 |
1277 | ||[001] | 1.98 x 10-17 |
1232 | [001] | 7.83 x 10-17 |
1232 | ||[001] | 5.65 x 10-18 |
1181 | [001] | 8.21 x 10-18 |
1181 | ||[001] | 7.28 x 10-19 |
1133 | [001] | 4.03 x 10-18 |
1133 | ||[001] | 2.54 x 10-19 |