Fig. 2 Spheroidized carbides in ferrite matrix in the ruptured stub. Nital 1% etch. More

Fig. 3 Intergranular carbides and corrosion in CF8M suction roll. Magnification 100× More

Fig. 6 Grain boundary carbides and creep lines in the sensitized area. 800 × More

Fig. 4 SEM showing the carbides depicted in Fig. 3 . 3150×. More

Fig. 9 Micrograph showing niobium carbides in interdendritic spaces. Etched in electrolytic nitric acid. 1000×. More

Fig. 8 (a, b) Inner race; aligned carbides in the matrix of tempered martensite More

Fig. 3 SEM micrograph of fractured surface showing precipitation of carbides in the austenite matrix and the formation of microcracks More

Fig. 5 Morphology of grain boundary carbides. 500× More

Fig. 2 Microstructure of hot gas casing showing extensive carbide formation. Etched in Vilella's, methanolic aqua regia and Groesbeck's reagents. More

Fig. 1 High-temperature degradation of a gas turbine transition duct. (a) Carbide, carbonitride precipitates, and oxide pentration along grain boundary. (b) Creep cracking along grain-boundary precipitates (arrows) on IN-617 panel. Creep cavities along grain boundaries link up and lead More

Fig. 7 Carbide volume fractions in the cladding of the Midland control specimens. More

Fig. 8 Variation in carbide precipitation (black dots) in delta ferrite, Midland 1 (mod. Murakami's). More

Fig. 9 Eutectic carbide clusters (arrows) and cracks in F-10 at the weld dilution zone/base metal (starts at top edge of micrograph) interface (Murakami's reagent). More

Fig. 13 TEM replica of a fracture surface of WC-3Co cemented carbide exhibiting Wallner lines (arrowed) 8 More

Fig. 3 Grain-boundary carbide film in the part shown in Fig. 1 and 2 . A sharp crack runs parallel to the grain-boundary precipitate. The crack apparently follows the sensitized (chromium-depleted) region adjacent to the carbide. More

Fig. 5 Villela-etched roll microstructure showing inhomogeneous carbide distribution in tempered martensite. (a) Carbide segregation at grain boundaries. (b) Massive carbide segregate with skeleton-like appearance. 500× More

Fig. 7 Histogram plot showing field-wise variation in carbide volume fraction in failed roll More

Fig. 8 EDS spectrum of vanadium-rich alloy carbide More

Fig. 9 EPMA micrographs of typical carbide segregation in failed roll. (a) SE image. (b) BSE image showing atomic number contrast. (c) Cr x-ray dot map. (d) V x-ray dot map. (e) Mo x-ray dot map. (f) W x-ray dot map. (g) Fe x-ray dot map. (h) C x-ray dot map. 2000× More

Fig. 10 EDS spectrum of chromium-rich region in alloy carbide segregate More