Table 3 Effect of tool pin profile on top surface and cross-sectional macrographs
Name of the joint | Top surface | Cross section | Observation |
|---|---|---|---|
FSW-STC |
|
| Defect-free top surface but tunnel defect is observed at the advancing side |
FSW-TAC |
|
| Defect-free top surface but tunnel defect is observed at the advancing side |
FSW-THC |
|
| Defect-free stir zone at both top surface and cross section |
FSW-TTC |
|
| Defect-free stir zone at both top surface and cross section |
UWFSW-STC |
|
| Defect-free top surface but tunnel defect is observed at the advancing side |
UWFSW-TAC |
|
| Defect-free top surface but tunnel defect is observed at the advancing side |
UWFSW-THC |
|
| Defect-free stir zone at both top surface and cross section |
UWFSW-TTC |
|
| Defect-free stir zone at both top surface and cross section |
