Finite element modelling of friction stir welded aluminium 2139 incorporating material property gradients
- AwangDraup A.J. ,
- Robson J.D. ,
- Prangnell P.B. ,
- et al
- AwangDraup A.J. ,
- Robson J.D. ,
- Prangnell P.B. ,
- Li Q.M. and
- Lunt M.J.
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Description
A method for incorporating local material property gradients across the weld zone in finite element simulations of friction stir welded 2139-T8 aluminium alloys was developed to predict the time evolution of strain. Local material flow stress was described by a simplified Johnson-Cook model. Material model parameters were attributed to evolution of strengthening precipitates in the alloy during thermomechanical loading. A Crawford Swift friction stir welding machine was employed to fabricate instrumented bead on plate welds in AA 2139-T8 at a tool rotational speed of 1000 rpm and advancing speed of 100 mm/min. Mechanical properties were characterised by hardness measurements and quasistatic tensile tests. Digital image correlation was performed for cross-weld tensile specimens using DaVis 8.2 software. Experimental and simulated time evolution strain maps were compared.
10th International Symposium, 20-22 May 2014, Session 9B: Modelling II, Paper 01
Subjects
- Computation
- Aluminium and Al alloys
- Nonferrous
- Material
- 2xxx Al series
- Friction welding
- Welding
- Process
- Friction stir welding
- Strain
- Weld zone
- Weld
- HAZ
- Thermomechanically affected zone
- Mechanical properties
- Properties
- Hardness
- Strength
- Ultimate tensile strength
- Dynamically recrystallised zone
- Heat treatment
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