Fig. 92 Fracture surface of a ferritic-pearlitic ductile iron. Note ductile fracture of ferrite in matrix around nodules and cleavage (brittle) fracture of pearlite in matrix. SEM, 50× (W.L. Bradley, Texas A&M University) More

Fig. 8 Elastic modulus of pearlitic ductile iron, compacted graphite iron, and chromium-molybdenum-alloyed gray iron as a function of applied tensile load. Source: After Ref 10 More

Fig. 5 Tensile properties versus hardness for as-cast pearlitic ductile iron and two tempered pearlitic malleable cast irons, one oil quenched and the other air quenched. Data are for 3000 kgf load. Source: Ref 2 More

Fig. 66 Microstructure of pearlitic ductile iron revealed using Beraha’s CdS tint etch. Note the ferrite rings (“bull’s eyes”) around the nodules or nodule clusters. Viewed with polarized light plus sensitive tint. Original magnification: 500× More

Fig. 67 Microstructure of pearlitic ductile iron containing cementite (C) particles and cementite in ledeburite (L), which will harm machinability. (a) Specimen etched with 2% nital. Note the ferrite “halos” (FH) around the nodules. (b) Microstructure as revealed using Beraha’s CdS reagent More

Fig. 15 Fracture surface of pearlitic ductile iron samples (ASTM A536, 100-70-03 grade, as cast) broken by impact at –20 °C (–4 °F). Different magnifications. Source: Ref 9 More

Fig. 18 Fracture surfaces of pearlitic ductile iron (ASTM A536, 100-70-03 grade, as cast) produced by impact loading. (a) Fracture surfaces generated at 0 °C (32 °F). Source: Ref 12 . (b) Detail of quasi-cleavage facets at 0 °C. (c) Detail of quasi-cleavage facets in a fracture surface More

Fig. 17 Microstructure of pearlitic ductile iron specimen containing 16% ferrite. Etched with 2% nital More

Fig. 18 Pearlitic ductile iron with ferrite halos. Etched with 2% nital More

Fig. 19 Microstructure of pearlitic ductile iron containing cementite (C) particles and cementite in ledeburite (L), which will harm machinability. Note the ferrite halos (FH) around the nodules. The specimen was etched with 2% nital. For version with color etching using Beraha’s CdS reagent More

Fig. 20 As-cast microstructure of pearlitic ductile iron (Fe-3.8%C-2.4%Si-0.28%Mn-1%Ni-0.05%Mg) etched using 2% nital and viewed using bright-field illumination (a) and polarized light plus sensitive tint (b) More

Fig. 62 Pearlitic ductile iron specimens containing (a) 16% ferrite and (b) 40% ferrite. 2% nital etch. Courtesy of George F. Vander Voort, Vander Voort Consulting More

Fig. 5 Mixed-mode fracture in a ferritic-pearlitic ductile iron tensile specimen, with a dark-colored region illustrating the fracture initiation zone exhibiting ductile tearing and the shiny overload region. Courtesy of Element Materials Technology-Wixom. Source: Ref 12 More

Fig. 87 Fracture surface of ferritic-pearlite ductile iron in Fig. 85 and 86 . The low-temperature fracture occurred via a brittle, quasi-cleavage mode. SEM, 715× (R.C. Voigt and L.M. Eldoky, University of Kansas) More

Fig. 83 As-cast ductile iron. Ferritic-pearlitic matrix. Etched with 4% nital. 100× More

Fig. 44 Inverse chill in pearlitic-ferritic ductile cast iron. Used with permission from Ref 13 More

Fig. 16 Variation in matrix microstructure of ductile irons. (a) Fully ferritic ductile iron. (b) Ferritic ductile iron containing 4% pearlite. (c) Ferritic ductile iron containing 16% pearlite. (d) Pearlitic ductile iron specimen containing 40% ferrite. All etched with 2% nital More

Fig. 7 Effect of variables on relation between cutting speed and tool life for three ductile irons. (a) Ferritic ductile iron (60-45-10). (b) Pearlitic ductile iron (80-60-03). (c) Pearlitic ductile iron (100-70-03). For all three irons, the results plotted were obtained in turning test More

Fig. 17 SEM views of striations on fatigue fracture surfaces of pearlitic and ferritic ductile irons. (a), mixture of striations and fractured pearlite lamellae on fracture surfaces of pearlitic ductile irons, 198X; (b), high-load fatigue fracture surface of a ferritic ductile iron, 375× More