Mechanical Behaviors of Friction Stir Spot Welded Joints of Dissimilar Ferrous Alloys under Opening-Dominant Combined Loads

Figure 4

Optical micrographs of (a) SPCC/SUS and (b) SUS/SPCC FSSW joints; (c) region R1 in (a) and (d) region R2 in (b); (e) Cr distribution profile in region R1 [21].

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