Change in microstructure and texture of friction stir welded Ti-6Al-4V alloy joints by phase transformation
- Yoon S.G. ,
- Ueji R. and
- Fujii H.
- Yoon S.G. ,
- Ueji R. and
- Fujii H.
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Friction stir welding experiments were undertaken on Ti-6%Al-4%V sheets (thickness 2 mm) in order to investigate the influence of process conditions on stir zone microstructure and local texture. Welding was performed at rotational speeds of 225-300 rpm and a traverse speed of 50 mm/min using a WC-based alloy tool. Stir zone microstructure was observed by optical microscopy, SEM and electron back scattering diffraction (EBSD). Local texture was also examined by EBSD. Issues discussed include inhomogeneous microstructure distribution associated with temperature gradient along the sheet thickness and the occurrence of fully lamellar, fully equiaxed alpha and bimodal lamellar/equiaxed morphologies in the stir zone.
10th International Symposium, 20-22 May 2014, Session 7B: Titanium, Paper 01
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