Fig. 6 Microstructures of 2.25Cr-1 Mo steels. (a) Base metal. (b) Weld metal. More

Fig. 6 A region of weld metal/base metal interface that exhibits martensite. 38× More

Fig. 8 Micrograph of a diaphragm weld, showing base metal and weld metal microstructures, along with corresponding hardnesses. 122× More

Fig. 2 Showing (a) creep damage in base metal adjacent to upper welds and (b) creep damage in weld metal. Etched in Aqua Regia saturated with CuCl 2 . More

Fig. 5 EDS spectra of the base metal of the screw (a) and the plating on the outside surface (b). More

Fig. 11 EDX microprobe spectrum obtained on the wire base metal using a 20kV beam voltage. More

Fig. 16 EDX microprobe spectrum of arrow F in Fig. 13(b) , showing the base metal. A 20 kV beam was used. More

Fig. 5 Higher-magnification view of a typical pit in the base metal away from the weld. 45×. More

Fig. 7 EDS analysis of base metal adjacent to the pit shown in Fig. 5 . More

Fig. 2 Hemispherical corrosion pits in the exposed carbon steel base metal. Remaining stainless steel cladding appears as gray islands. More

Fig. 17 Cross section of type 304L blade (sample 4), showing cracks in base metal and in weld repairs at hub-to-blade attachment. More

Fig. 6 Interface of weld buildup and base metal. Weld is on left (white, unetched), martensite on right (black and white, acicular). A crack is visible under the weld. 2% nital etch. 190× More

Fig. 4 Typical microstructure of the base metal. (a) Fry's reagent, 77×. (b) Fry's reagent. 616×. More

Fig. 14 Micrograph of light-colored phase found in the base metal (pipe) next to weld W-19. 30.5× More

Fig. 6 Micrograph of sleeve/base metal interface More

Fig. 7 Micrograph of branched crack in the base metal More

Fig. 9 Crack starting from weldment and extending into base metal More

Fig. 11 Microhardness profile across weld/HAZ/base metal interface More

Fig. 21 SEMs showing crack and corrosion front penetration into the base metal More

Fig. 3 Transgranular crack that initiated in base metal in crevice region. More