| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Friction Stir Welding and Processing XI
|
| Presentation Title |
Phosphorus Segregation and Its Effect on Properties in Friction Stir Welded High Phosphorus Weathering Steel |
| Author(s) |
Takumi Kawakubo, Kohsaku Ushioda, Hidetoshi Fujii |
| On-Site Speaker (Planned) |
Takumi Kawakubo |
| Abstract Scope |
Phosphorus (P) addition is expected to simultaneously increase the strength and corrosion resistance of weathering steels but causes solidification cracking during the fusion welding process. To avoid this problem, the added P content is currently limited. Friction stir welding (FSW), which is a solid-state joining process, can overcome the problem with weldability in the fusion welding process. On the other hand, the high P concentration causes the P segregation to the grain boundaries besides the solidification segregation, possibly leading to reduce toughness. In this study, high P weathering steel was prepared and FSW was performed at temperatures below A1 and above A3. For the base pearlite steel material and the stir zones, the P segregation and its effect on toughness were investigated in detail and the mechanism behind was discussed focusing on the effect of grain size on grain boundary segregation and toughness. |
| Proceedings Inclusion? |
Planned: |