Friction stir welding of high temperature materials (Mo, Ti)
- Fujii H. ,
- Kato H. ,
- Nakata K. ,
- et al
- Fujii H. ,
- Kato H. ,
- Nakata K. and
- Nogi K.
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Friction stir welding (FSW) was employed to weld Mo and Ti sheets (thickness 1.5 and 2 mm, respectively), the effects of process conditions on weldability as well as mechanical properties and microstructure of joints was investigated, and the importance of dynamic recrystallisation during welding was examined. FSW was performed at constant rotation speed and variable welding speed (100-600 mm/min for Mo, 50-300 mm/min for Ti) to control heat input. Microstructure was observed by field emission SEM and TEM. Mechanical properties were characterised by Vickers microhardness measurements and tensile tests to determine ultimate strength, proof strength and elongation. The relations between welding speed, mechanical properties and microstructure (grain size and dislocation density) were studied.
6th International Symposium, 10-13 Oct 2006, Session 2A: FSW of High Temperature Alloys, Paper 02
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