Fig. 6. An SEM image showing cracks propagating through eutectic carbides.Figure optionsDownload full-size imageDownload as PowerPoint slide
Fig. 7. Chemical compositions of Norem weld and inter-dendritic carbides analyzed by EDS.Figure optionsDownload full-size imageDownload as PowerPoint slide
Fig. 8. An inverse pole figure map of the Norem weld with a crack.Figure optionsDownload full-size imageDownload as PowerPoint slide
Fig. 9. EBSD phase map revealing the Norem weld containing very low ferrite content, and its precipitates mainly composed of M7C3. Notice that ferrite and Cr23C6 phases are both cubic and it CUDC-101 is difficult to differentiate the two by the software. However, some of the points are possibly correctly differentiated, because Cr23C6 and ferrite have 5 and 4 reflectors, respectively.Figure optionsDownload full-size imageDownload as PowerPoint slide
In histamine work, an effort was made to reduce the residual tensile stress of the Norem weld by the SP and MP processes. Fig. 10 shows the EBSD results of Norem weld specimens subjected to different peening processes, that is, the as-welded specimen, the weld specimen with SP applied on the final welding layer only, and the weld specimen with MP applied on each welding layer. IPF maps display the grain orientation which is parallel to the peening direction and normal to the weld surface. The IPF maps show no discernible differences in grain size and grain orientation after peening process. No grain deformation was observed.