
171 Mechanical and Microstructural of AA7075-T6
FIGURE 10.8 UWFSW with and without xture setup.
10.9 DESIGN OF EXPERIMENT (DOE)
Design of experiment technique is used to perform UWFSW process to obtain bet-
ter results in welded joint. Three input parameters, tool shoulder diameter, welding
speed, and tool speed, were selected to perform the experiments in this research
work to give better results when the number of factor is 3, with their levels shown
in Table 10.4. Mostly, experiments were conducted to obtain the defect-free welding
joints. In this research work, full factorial arrays with 3 columns and 16 rows were
selected as shown ...