【摘 要】
：
On basis of the RNG k-ε model, the finite volume model of friction stir welding of Ti6Al4V alloy is established by the ANSYS FLUENT software.The effect of
【出 处】
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2012 Postdoctoral Symposium of China on Materials Science &a
论文部分内容阅读
On basis of the RNG k-ε model, the finite volume model of friction stir welding of Ti6Al4V alloy is established by the ANSYS FLUENT software.The effect of rotational tool geometry on titanium alloy flow behaviour is attained.The results of numerical simulation show that the flow direction of material near the rotational tool is the same as that of rotational tools rotational direction.The flow velocity of material near the rotational tool is much bigger than that of other region in weldment while the peak value appears near the edge of shoulder.Changing only the rotational tool shoulders diameter or the pin tips diameter unchanges the flow direction of material during the welding process.With the increase of diameter of shoulder and pin tip, the material flow velocity increases.From the view of elimination of root defects, increasing the diameter of pin tip is better than increasing the diameter of shoulder.
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