Prediction of microstructural characteristics of heat affected zone in friction stir welding of 7075 Al alloy
- Abdollah-Zadeh A. ,
- Mehri A. ,
- Entesari S. ,
- et al
- Abdollah-Zadeh A. ,
- Mehri A. ,
- Entesari S. and
- Assadi H.
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Numerical modelling and experimental measurements were undertaken to investigate the extension and microstructure of the HAZ during friction stir welding (FSW) of 7075 aluminium alloy (Al, 5.86%Zn, 2.37%Mg, 1.91%Cu) thin sheets (thickness 1.2 mm). Welding was conducted at a rotational speed of 1000 rpm and welding speed of 50 mm/min. The thermal cycles of FSW were recorded by inserting thermocouples into alloy specimens. The grain growth kinetic parameter of the parent metal was obtained using isothermal annealing and then mean grain size was measured by optical microscopy. Issues discussed include the effect of the FSW thermal cycle on HAZ grain growth and the HAZ grain size at different distances from the welding centreline.
10th International Symposium, 20-22 May 2014, Poster Session, Paper 02
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