Figure 8. TEM analysis for the 25/28.6. (a) Indicating the location of TEM analysis in SEM image of
the welding zone. (b) TEM bright‐field image and SAED pattern insets, examined at the location (1)
in figure (a), confirmed Al‐rich phase (white globular shape) and Al2Cu eutectic phase (gray region),
and (c) TEM bright‐field image and SAED pattern inset of Al4Cu9, examined at the location (2) in
figure (a).