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Microstructural Evolution and Hardness of Dissimilar Lap Joints of ODS/Stainless Steel by Friction Stir Welding

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Figure

Fig. 1Optical microscopy image of the cross section of the ODS/ODS joint: (a) overview and (b) detail with Vickers indent row acrossthe welding zones.
Figure 3 shows the microstructure of the ODS/joint after recrystallization treatment at 1380°C for 1 h inlaboratory air
Fig. 4Details of Fig. 3(b): (a) optical microscopy image at higher resolution, (b) EBSD orientation map and (c) EBSD grain boundarymap.
Fig. 6Optical microscopy image of the cross section of the 430/430 joint: (a) overview, (b) SEM image showing the indents A­D rowacross the welding zones, and an enlarge SEM image of (c) the indent B and (d) indent C regions.
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