Abstract
Friction stir welding was applied to 304 austenitic stainless steel. The microstructural evolution and hardness distribution in the weld were investigated. The stir zone (SZ) and thermomechanically affected zone (TMAZ) showed dynamically recrystallised and recovered microstructures, respectively. The hardness of the SZ was higher than that of the base material and the maximum hardness was located in the TMAZ. The higher hardness in TMAZ was attributed to high density of dislocations and sub-grains. Electron microscopic observations revealed that ferrite and sigma phase were formed in austenite matrix in the SZ depending on the cooling rate during FSW.
| Original language | English |
|---|---|
| Pages (from-to) | 73-77 |
| Number of pages | 5 |
| Journal | Proceedings of the International Offshore and Polar Engineering Conference |
| Publication status | Published - 2004 Dec 1 |
| Event | The Fourteenth International Offshore and Polar Engineering Conference - ISOPE 2004 - Toulon, France Duration: 2004 May 23 → 2004 May 28 |
Keywords
- Austenite
- Ferrite
- Friction stir welding
- Microstructure
- Recovery
- Recrystallisation
- Sigma
- Stainless steel
ASJC Scopus subject areas
- Energy Engineering and Power Technology
- Ocean Engineering
- Mechanical Engineering