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spheroidal graphite

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Published: 01 December 2008
Fig. 6 Microstructure of spheroidal graphite in cast ductile iron. Graphite (dark) is surrounded by ferrite (white) in a pearlite matrix. Original magnification: 250×. Courtesy of Bruce Boardman More
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Published: 01 January 1990
Fig. 3 Typical graphite shapes after ASTM A247. I, spheroidal graphite; II, imperfect spheroidal graphite; III, temper graphite, IV, compacted graphite; V, crab graphite; VI, exploded graphite; VII, flake graphite More
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Published: 31 August 2017
Fig. 5 Typical graphite shapes after ASTM A247. I, spheroidal graphite; II, imperfect spheroidal graphite; III, temper graphite; IV, compacted graphite; V, crab graphite; VI, exploded graphite; VII, flake graphite More
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Published: 01 December 1998
Fig. 1 Spheroidal graphite in an unetched ductile iron matrix shown at 75× (a) and in the etched (picral) condition shown at 300× (b). Etching reveals that the matrix consists of ferritic envelopes around the graphite nodules (bull's-eye structure) surrounded by a pearlitic matrix. More
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Published: 01 December 1998
Fig. 2 Austempered ductile iron structure consisting of spheroidal graphite in a matrix of bainitic ferritic plates (dark) and interplate austenite (white) More
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Published: 01 December 1998
Fig. 3 Microstructures of ductile irons. All contain spheroidal graphite. Nital etch; 500×. (a) 100% ferrite; 170 HB. (b) 50% ferrite, 50% pearlite; 207 HB. (c) Spheroidite; 265 HB More
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Published: 01 December 2008
Fig. 21 SEM micrographs of deep-etched spheroidal graphite samples showing a fractured graphite spheroid (a). Nodularity decreases from (a) through (c). More
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Published: 01 December 2008
Fig. 23 Tensile and yield strength of spheroidal graphite iron test bars versus resonant frequency. Source: Ref 55 More
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Published: 01 December 2008
Fig. 10 Tensile strength versus hardness for spheroidal graphite (SG), compacted graphite (CG), and flake graphite (FG) irons. Source: Ref 18 More
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Published: 31 August 2017
Fig. 13 Scanning electron microscopy images of spheroidal graphite showing conical sectors and graphite nuclei. (a) Well-formed graphite spheroid. Reprinted with permission from The American Foundry Society. Source: Ref 57 . (b) Graphite spheroid with separated sectors. Reprinted More
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Published: 31 August 2017
Fig. 35 Microstructures of spheroidal graphite iron found in the same microshrinkage cavity from a cast plate. (a) Primary austenite dendrite. (b) Eutectic austenite dendrite with encapsulated graphite spheroids. (c) Overall view of microshrinkage. Reprinted with permission from The American More
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Published: 31 August 2017
Fig. 15 Cooling curve of spheroidal graphite iron for various numbers of growing nodules. Source: Ref 8 More
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Published: 31 August 2017
Fig. 16 Two-dimensional simulated microstructure evolution of a spheroidal graphite iron with the solidification time of (a) 4.8, (b) 6.8, (c) 10.4, and (d) 17.4 s. Source: Ref 66 More
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Published: 31 August 2017
Fig. 4 Microstructure of unalloyed spheroidal graphite cast iron austempered at (a) 360 °C (680 °F) for 60 min (original magnification: 500×) and (b) 280 °C (535 °F) for 90 min More
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Published: 31 August 2017
Fig. 6 Influence of spheroidal graphite iron metal matrix on the mechanism of tool wear. Source: Ref 7 More
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Published: 31 August 2017
Fig. 19 Relative machinability of several types of spheroidal graphite iron (ductile iron) and steel. ADI, austempered ductile iron. Source: Ref 20 More
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Published: 31 August 2017
Fig. 21 Tool life when machining traditional spheroidal graphite iron (GJS-500-7 and GJS-600-3) and solution-strengthened spheroidal graphite iron (GJS-500-14 and GJS-600-10). Machining was done at a cutting speed of 240 m/min (790 ft/min) until 0.2 mm (0.008 in.) flank wear. Source: Ref 22 More
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Published: 31 August 2017
Fig. 1 Spheroidal graphite in as-cast ductile iron (Fe-3.7%C-2.4%Si-0.59%Mn-0.025%P-0.01%S-0.095%Mo-1.4%Cu) close to the edge of the specimen, which was 30 mm (1.2 in.) in diameter. The specimen was embedded. As-polished. Original magnification: 100× More
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Published: 31 August 2017
Fig. 38 Strength versus resonant frequency in spheroidal graphite iron test bars. Source: Ref 85 More
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Published: 31 August 2017
Fig. 12 (a) Microstructure of spheroidal graphite iron alloy derived from x-ray tomography. (b) Representative volume element (RVE) finite-element model. (c) Example of plastic strain distribution in the RVE at horizontal tensile load More