Experimental and numerical study of friction stir welding with double-shaft stir probe

摘要

According to the experiment and simulation results, the following conclusions can be obtained: 1. The self-adaption model of heat generation can accurately model the heat-transfer process in FSW. The difficulty of determining coefficient of friction has been settled. In the simulation, we adopt R_(eL)(T) as an important parameter. 2. By the FEM model of FSW welding, nodes will experience some time before reaching the top temperature. Comparing the stability period of welding with the probe's pulling out period, we find that the temperature distribution changes a little. The heat generated at the tool probe /workpiece interface accounts for 20% approximately of the total.