کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
780685 | 1464549 | 2010 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: A model relating tool torque and its associated power and specific energy to rotation and forward speeds during friction stir welding/processing A model relating tool torque and its associated power and specific energy to rotation and forward speeds during friction stir welding/processing](/preview/png/780685.png)
Torque (M) is a very important quantity in the friction stir welding (FSW) process but a satisfactory model relating M to the two major FSW parameters, rotation speed (ω) and forward speed (v), has not been well developed. In this work, a better model of the form, M=f(ω, v), was sought. Experimentally, FSW of an aluminium alloy was conducted over a wide range of ω and v values and M was measured. An exponential decay function has been found to fit all the M versus ω data well and is meaningful for any ω value. The effect of v on M can approximately be accounted for through linearly relating the model parameters to v. The model allows for a detailed evaluation of the sensitivity of M to changes in ω and v. The model decay and the pre-exponential parameters need to be adjusted to make predictions for different aluminium alloys in the low ω range. Both the model and experimental data demonstrate a diminishing alloy effect on material flow resistance as ω increases. Furthermore, models of tool power (PTool) and specific energy (Es) can be derived from the model for M and give predictions that are also meaningful over the entire range of ω values. Finally, the dependences of PTool and Es on ω and v and the relationship between Es and the processing zone temperature will be discussed.
Journal: International Journal of Machine Tools and Manufacture - Volume 50, Issue 12, December 2010, Pages 1023–1030