Hydrogen Embrittlement in Titanium
Hydride formation, critical H levels, prevention.
Quick Answer
Hydrogen embrittlement forms brittle TiH2 hydrides. Sources: pickling, welding, cathodic charging.
Critical Levels
| Grade | Safe (ppm) | Threshold |
|---|---|---|
| Grade 2 | < 150 | > 200 |
| Grade 5 | < 125 | > 150 |
Prevention
- Vacuum furnace < 10^-4 torr
- Limit HF/HNO3 pickling time
References
- ASTM B265, AMS 2759