Numerical and experimental study on friction stir welding of aluminum alloy pipe
Journal of Materials Processing Technology(2019)
摘要
An attempt has been made in this work to study the temperature distribution, force variation, and material flow behavior by developing a rigid viscoplastic model for friction stir welding (FSW) of pipes. An optimum value of plunge depth is predicted through simulation to fabricate the weld. The weld defect has been predicted by using point tracking method and the same is compared with experimental observation. Influence of plunge depth on hardness and microstructure is studied to characterize the welded sample. Plunge depth of 0.3 mm results in sufficient contact at the interface of the pipe and tool shoulder, and produces a good weld. Lower grain size is observed for plunge depth of 0.3 mm as compared to 0.5 mm, but with negligible variation in hardness.
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关键词
Friction stir welding,Pipe welding,Lagrangian method,Material flow,Microstructure
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