A microstructure and crystallographic texture investigation of static shoulder friction stir welding of Ti-6Al-4V
- Jiang X. ,
- Davies P. ,
- Wynne B. ,
- et al
- Jiang X. ,
- Davies P. ,
- Wynne B. and
- Threadgill P.
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The surface quality, microstructure and crystallographic texture were investigated as a function of traverse speed for friction stir welds of Ti-6Al-4V, produced using static shoulder tools consisting of a tungsten-rhenium probe and a silicon nitride shoulder (SSFSW). Traverse speeds of 50, 100 and 150 mm per minute were used to weld plates of composition Ti, 6.44%Al, 3.98%V under force control mode and using tool rotation speed of 900 rpm. The surface quality, microhardness, microstructure and crystallographic texture were investigated for cross-sections, side and normal sections of the welds, using a surface profiling system, optical, SEM and electron backscattered diffraction. Detailed analysis of the ring spacing is presented for the different weld speeds and microstructures are shown in the HAZ and stir zones. Crystallographic texture evolution in the FSW weld is discussed and demonstrated schematically in terms of bcc shear texture components.
8th International Symposium, 18-20 May 2010, Session 3B: Titanium, Paper 03
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