22 Experimental Study of Friction Stir Welding on Dissimilar …
261
Table 22.3 Macrograph of specimens at mid-section
the specimens, DTS001 and DTS002 were in good condition. Meanwhile some
micro cracks were detected on the specimen of DTS003, DTS004, and DTS005
thus introducing lower tensile strength as shown in Fig. 22.2 previously. This
might have occurred due to incompatible welding parameters used. In addition,
the dissimilar thickness might have given a big gap of uneven heat distribution
between the advancing and retreating sides [12, 13].
22.4 Conclusions
The conclusions from this study can be drawn as follows:
a. The dissimilar plate thickness of aluminum can be joined by the friction stir
welding process but somehow, due to improper matching of welding parameters,
261
Table 22.3 Macrograph of specimens at mid-section
the specimens, DTS001 and DTS002 were in good condition. Meanwhile some
micro cracks were detected on the specimen of DTS003, DTS004, and DTS005
thus introducing lower tensile strength as shown in Fig. 22.2 previously. This
might have occurred due to incompatible welding parameters used. In addition,
the dissimilar thickness might have given a big gap of uneven heat distribution
between the advancing and retreating sides [12, 13].
22.4 Conclusions
The conclusions from this study can be drawn as follows:
a. The dissimilar plate thickness of aluminum can be joined by the friction stir
welding process but somehow, due to improper matching of welding parameters,