Abstract
Nickel alloys with high chromium content provide optimum resistant to stress corrosion cracking for service in the reactor coolant system of commercial nuclear power plants. High chromium nickel-base alloys however present many challenges, such as less than ideal weldability and susceptibility to solidification cracking or solid-state cracking depending on welding conditions and dilution effects with dissimilar metals. Moreover, the presence of large solidification grains, typical of nickel alloy weld metals, makes ultrasonic examination of the weldment difficult. Magnetic stirring of the nickel alloy weld pool has the potential to address these challenges and improve joining, overlay welding, cladding, and repair of critical components in commercial nuclear power plants. This study evaluates use of magnetic arc stirring to modify weld pool solidification conditions in order to promote a fine solidification grain structure in nickel alloy welds.
| Original language | English |
|---|---|
| Pages (from-to) | 1565-1577 |
| Number of pages | 13 |
| Journal | American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP |
| Volume | 6 |
| Issue number | PARTS A AND B |
| DOIs | |
| Publication status | Published - 2011 |
| Externally published | Yes |
| Event | ASME 2011 Pressure Vessels and Piping Conference, PVP 2011 - Baltimore, MD, United States Duration: 17 Jul 2011 → 21 Jul 2011 |
Keywords
- Filler metal (Inconel™) 52M
- Gas tungsten arc welding (GTAW)
- Grain refinement
- Magnetic stir welding
- Nickel-base weld metal
- Solidification cracking
- Ultrasonic examination