Abstract: | Constant extension rate tests on smooth samples, with strain rate (SR) values from 10−6 s−1 up to 20 s−1, were used to study stress corrosion cracking (SCC) systems in face-centred cubic alloys. It was found that by increasing the SR a monotonic increase of the (crack propagation rate) takes place. It was also observed that the slope α in vs. plots had different values for different SCC morphologies. Intergranular SCC is more steeply accelerated by SR, αIG=0.5-0.7, than transgranular SCC, αTG=0.2-0.3. The differences found between intergranular SCC and transgranular SCC were analysed under the light of the available SCC mechanisms. |