Microstructure evolution during friction stir processing of Ti-5111
- Rubal M.J. ,
- Juhas M.G. and
- Lippold J.C.
- Rubal M.J. ,
- Juhas M.G. and
- Lippold J.C.
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The microstructural evolution during FSW of beta-annealed plates of Ti-5111 (Ti, 5%Al, 1%Sn, 1%Zr, 1%V, 8%Mo) was investigated above and below the beta transus temperature. Variable penetration tools of a refractory-based material with different dimensions were used to achieve the necessary processing temperatures. Thermocouples recorded the thermal histories experienced in the stir zones (SZ) and the heat affected zones (HAZ) at a sampling rate of 1000 per second. Processed zones were cut into transverse sections for optical and SEM examination. Electron back scatter diffraction (EBSD) and microhardness mapping was also conducted. Hot torsion tests were performed at 940 and 1000 deg.C to simulate the observed microstructures. A continuous cooling transformation diagram was generated from the results of single sensor differential thermal analysis (SS DTA) and dilatometry experiments.
8th International Symposium, 18-20 May 2010, Session 3B: Titanium, Paper 02
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