Quantification of microstructural homogeneity and the mechanisms of particle refinement during FSP Al-Si alloys
- Chan C.Y. and
- Prangnell P.B.
- Chan C.Y. and
- Prangnell P.B.
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The microstructure, particle refinement and homogeneity of distribution of the refined particles during the friction stir processing (FSP) of AlSi alloys were investigated. A commercial hypo-eutectic LM24/A380 Al-8.9%Si gravity die cast alloy (26 mm thickness) was used. FSP was carried out using a H13 steel tool with a range of tool rotation speeds (300-900 rpm) and travel speeds (100-400 mm/min). The influence of processing parameters on the mechanisms and homogeneity of particle refinement was determined. Particle refinement and clustering was quantified using detailed image analysis and Dirichlet tessellation. Particle break-up was studied by following the behaviour along the flow lines through the deformation zone around the tool. A computer model was also developed to predict the temperature profile during FSP in relation to particle refinement.
8th International Symposium, 18-20 May 2010, Session 9B: FSP and Derivatives, Paper 02
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