Fig. 2 Optical photomicrographs showing (a) presence of a crack within the ferrite band, (b) flow contours in the HAZ, and (c) banded ferrite-pearlite structure in the PM More

Fig. 4 Microhardness values of ferrite band, HAZ, and PM More

Fig. 3 Delta ferrite in as-fabricated Midland specimen (modified Murakami's reagent). More

Fig. 4 Volume fraction of delta ferrite in the cladding of the Midland control specimens. More

Fig. 5 Mean free path in the delta ferrite in the cladding of the Midland control specimens. More

Fig. 6 Form (shape) factors of isolated delta ferrite 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. 12 Discontinuous cracking on crystallographic planes of ferrite. (×300). More

Fig. 3 Section of attacked cast steel flange showing voids surrounded by ferrite. 500× More

Fig. 15 TEM replica of the ferrite/pearlite structure at C in Figure 2 showing fresh pearlite lamellae; picral etch; 4400×. More

Fig. 16 TEM replica of ferrite/pearlite structure at D in Figure 2 showing both fresh pearlite lamellae and partially dissolved pearlite lamellae, picral etch; 4400×. More

Fig. 9 Ferrite/martensite microstructure near fracture surface in H.A.Z. 1000 × More

Fig. 10 Unbroken piston showing ferrite/pearlite structure at comparable position to Fig. 9 . 1000 × More

Fig. 7 Detail of corrosion, showing preferential attack of delta ferrite Same etch as Fig. 6 — original magnification was 50× More

Fig. 2 Enlargement of a delta ferrite stringer noted within the “C” material. These stringers were also noted within the “A” and “B” material, but to a lesser extent. Vilella's reagent. Magnification 1000× More

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

Fig. 7 Scanning electron micrograph of surface of particulate disk showing ferrite particles covered with binder material More

Fig. 1 Fire-extinguisher case that failed because of ferrite streaks resulting from overheating during spinning. (a) Top of the case. Dimensions given in inches. (b) Micrograph showing ferrite streaks. 150× More

Fig. 3 Micrograph from the cope side of the main-bearing journal. Ferrite caps, which partially cover the graphite nodules and cause the broken-open surface condition, are shown. The burrs rise above the surface from 4 to 13 μm. Etched with nital. 220x More

Fig. 4 Microstructures of the cracked casting. (a) Ferrite/pearlite matrix is representative of the cracked casting. 100x. (b) Structure of cracked casting adjacent to the gas defect. The white constituents in the dark pearlite zone are carbides. White regions in the fine type D graphite More