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Fig. 28.2 Pin profiles
Fig. 28.3 Edge preparation
affect the quality of the FSW joints. The pin profiles and edge preparation selected
for this experiment setting are shown in Figs. 28.2 and 28.3, respectively.
For the selected parameter setting, the distance of the deformation was measured
by using an optical microscope. The location for each deformation is shown in
Fig. 28.4. The measurement may vary and it is depending on the parameters applied.
This measurement will be used for further analysis. Table 28.2 shows the design
of experiment (DOE) setup by using the Taguchi’s L9 orthogonal array and then
analyzing by using Minitab 19.
28.3 Result and Discussion
Without the inner mandrel, the deformation occurrence cannot be avoided but the
impact could be controlled with a proper setting. Figure 28.5 shows the macro image
on the deformation section for each specimen and Table 28.3 shows the analysis of
the deformation gathered from the experiment. Based on these results found, Minitab
19 is used to analyze the data in order to determine the optimum welding parameters
based on the measurement of deformation. Meanwhile, Table 28.4 shows the analysis
of variance (ANOVA) of the results.