Abstract
The effect of machining on stress corrosion crack initiation of annealed Type 316L stainless steel was investigated through accelerated testing in high-temperature hydrogenated water. It was observed that stress corrosion cracks only initiated on machined surfaces with machining marks perpendicular to the loading direction and a porous inner oxide layer was identified as an important factor contributing to crack initiation. Furthermore, most cracks stopped within the machining-induced near-surface ultrafine-grained layer and the machining-induced residual stresses did not appear to have a significant effect on crack initiation. A correlation between crack initiation and the surface/near-surface features is identified and discussed.
| Original language | English |
|---|---|
| Pages (from-to) | 54-65 |
| Number of pages | 12 |
| Journal | Corrosion Science |
| Volume | 138 |
| Issue number | 1 |
| Early online date | 7 Apr 2018 |
| DOIs | |
| Publication status | Published - 2018 |
Keywords
- Stress corrosion cracking
- Austenitic stainless steel
- Machined surface
- Ultrafine-grained layer
- Inner oxide