Heat transfer modeling of dissimilar FSW of Al 6061/AZ31 using experimentally measured thermo-physical properties
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A heat transfer numerical model is developed for friction stir welding of dissimilar materials Al 6061 and AZ31 alloy. Thermo-physical properties were experimentally determined for the stir zone and compared with the base alloys. Experimentally determined thermo-physical properties of the stir zone are not strictly the average values of the base alloys but exhibit a complex relationship with the microstructural features and the intermixing of Al and Mg in the weld region. The numerical model is employed to predict the temperature distribution on the advancing and retreating side. A good agreement between computed and experimentally measured results was obtained at 24-mm, 20-mm, and 16-mm tool shoulder diameter. The proposed model can be used to predict the thermal cycle, peak temperature, and thermo-mechanically affected zone for welding of dissimilar materials on friction stir welding.
KeywordsDissimilar weld Friction stir welding Intermixing Numerical modeling Thermo-physical properties
The authors would like to thank Prof. Satish Vitta, Metallurgical Engineering and Materials Science IIT Bombay, for his help with thermal diffusivity measurement. The authors would also like to acknowledge Mr. Aroh Shrivastava, Institute for Plasma Research, for his help in specific heat capacity measurement.
This study was funded by the Board of Research in Nuclear Sciences (BRNS) (project number 57/14/05/2019-BRNS) and Science and Engineering Research Board (SERB) (project number CRG/2018/004944).
- 1.Mordike BL, Ebert T (2001) Magnesium properties - applications - potential. Mater Sci Eng A 302(1):37–45 https://doi.org/10.1016/S0921-5093(00)01351-4
- 2.Thomas WM, Nicholas ED, Needham JC, Murch MG, Temple- Smith P, Dawes CJ (1991) Friction Stir Butt Welding, International Patent Application No. PCT/GB92/02203, and US Patent No. 5, 460 (1995) 317 https://patents.google.com/patent/WO1993010935A1/
- 8.Nandan R, Prabu B, De A, DebRoy T (2007) Improving reliability of heat transfer and materials flow calculations during friction stir welding of dissimilar aluminum alloys. Weld Res 86:313–322Google Scholar
- 10.Shojaeefard MH, Behnagh RA, Akbari M, Givi MKB, Farhani F (2013) Modelling and pareto optimization of mechanical properties of friction stir welded AA7075/AA5083 butt joints using neural network and particle swarm algorithm. Mater Des 44:190–198. https://doi.org/10.1016/j.matdes.2012.07.025 CrossRefGoogle Scholar
- 11.Jonckheere C, De Meester B, Denquin A, Simar A (2013) Torque, temperature and hardening precipitation evolution in dissimilar friction stir welds between 6061-T6 and 2014-T6 aluminum alloys. J Mater Process Technol 213(6):826–837. https://doi.org/10.1016/j.jmatprotec.2013.01.001 CrossRefGoogle Scholar
- 19.Malarvizhi S, Balasubramanian V (2012) Influences of tool shoulder diameter to plate thickness ratio (D/T) on stir zone formation and tensile properties of friction stir welded dissimilar joints of AA6061 aluminum-AZ31B magnesium alloys. Mater Des 40:453–460. https://doi.org/10.1016/j.matdes.2012.04.008 CrossRefGoogle Scholar
- 25.Cai W, Daehn G, Vivek A, Li J, Khan H, Mishra R, Komarasamy M (2018) A state-of-the-art review on solid-state metal joining. J Manuf Sci Eng C 2018. https://doi.org/10.1115/MSEC2018-6683