312
T. M. N. T. Anuwa et al.
Table 29.5 Macrostructural result
Specimen Macrostructure on WNZ
Description
1
Less smooth weld surface, slag inclusion
occurred in welded joint which can be
accepted under ISO 25239-5, good weld
penetration
2
Very Smooth weld surface, no defects
occurred in welded joint, good weld
penetration
3
Welding imperfection appeared, slag
inclusion which can be accepted under
ISO 25239-5
4
Very smooth weld surface, no defects
occurred in welded joint, Good weld
penetration detected
5
Weld imperfection appeared, slag
inclusion can be accepted under ISO
25239-5
29.4 Conclusion
Based on these results, several conclusions can be drawn as follows:
1. The friction stir welded joints show the best mechanical properties in terms of
tensile strength when compared to the BM. The FSW joint exhibited higher
strength values which can be achieved up to 85%.
2. The parameters setting at 910 rpm with a travel speed of 340 mm/min, 2° of
tilt angle, and dwelling at 120 s produced a fine and smooth friction stir welded
surface.