Friction Stir Additive Manufacturing—A Review
29
Table 1
(continued)
S. No. Type
Process
Description
5
FSAM Type 2
Experimental paper on FSAM of Mg-based WE43
In this study, two multi-layered builds of a total thickness of
5.6 mm each have been fabricated from lap welding of four
plates of Mg-based WE43 alloy under different welding
parameters. The mechanical properties have been analysed in
detail, the microstructure for various different levels of the weld
has been studied individually and the defects and problems
faced in welding through FSAM technique have been discussed.
The study reports a higher strength (400 MPa) with considerable
ductility (17%) of the welded specimen [37]
6
FSAM Type 2
Experimental paper on similar FSAM of Al 7055
This report investigates the feasibility of FSAM for aluminium
7055 alloy. A 101.6 mm structure is built by joining 15 plates of
Al 7055 of equal thickness (6.7 mm each). Mechanical testing
reported a yield strength of 300 MPa, ultimate strength of
382 MPa and elongation of 1.94%. This is almost a 60%
reduction as compared to the base metal (YS: 552 MPa, UTS:
644 MPa, elongation: 9.55%). Heat treatment of the specimens
was not effective and reported a very small increase in the
properties. The probable reason for the low strength was
attributed to welding defects especially cold lapping and
wormholes which were revealed by the macrographic study. The
report suggested that welding defects have a major influence in
FSAM as compared to FSW processes due to the recurring
nature of the process. Thus, welding parameter optimization is
an important aspect to realize the complete potential of FSAM
[91]
(continued)
29
Table 1
(continued)
S. No. Type
Process
Description
5
FSAM Type 2
Experimental paper on FSAM of Mg-based WE43
In this study, two multi-layered builds of a total thickness of
5.6 mm each have been fabricated from lap welding of four
plates of Mg-based WE43 alloy under different welding
parameters. The mechanical properties have been analysed in
detail, the microstructure for various different levels of the weld
has been studied individually and the defects and problems
faced in welding through FSAM technique have been discussed.
The study reports a higher strength (400 MPa) with considerable
ductility (17%) of the welded specimen [37]
6
FSAM Type 2
Experimental paper on similar FSAM of Al 7055
This report investigates the feasibility of FSAM for aluminium
7055 alloy. A 101.6 mm structure is built by joining 15 plates of
Al 7055 of equal thickness (6.7 mm each). Mechanical testing
reported a yield strength of 300 MPa, ultimate strength of
382 MPa and elongation of 1.94%. This is almost a 60%
reduction as compared to the base metal (YS: 552 MPa, UTS:
644 MPa, elongation: 9.55%). Heat treatment of the specimens
was not effective and reported a very small increase in the
properties. The probable reason for the low strength was
attributed to welding defects especially cold lapping and
wormholes which were revealed by the macrographic study. The
report suggested that welding defects have a major influence in
FSAM as compared to FSW processes due to the recurring
nature of the process. Thus, welding parameter optimization is
an important aspect to realize the complete potential of FSAM
[91]
(continued)