Fig. 19.11 Percent of intergranular fracture on CVN specimen fracture surfaces as a function of tempering temperature for fully austenitized and quenched 52100 steel and 4340 steel. Shaded regions show fracture after tempering at temperatures usually used to produce high strength More

Fig. 14 Intergranular fracture viewed under the scanning electron microscope. Note that fracture takes place between the grains; thus, the fracture surface has a “rock candy” appearance that reveals the shapes of part of the individual grains. More

Fig. 2.21. Intergranular fracture produced by temper embrittlement in a Ni-Cr-Mo-V steel. (50X; shown here at 80%) More

Fig. 5-53 Intergranular fracture of 4340 steel containing 0.03% phosphorus after tempering at 400 °C (752°F). Specimen was broken by impact loading at room temperature. Fractobgraph of the fracture surface of an impact sample of a 4340 steel of a realtively high P content. (From G. Krauss More

Fig. 39 SEM micrograph showing an intergranular fracture mode, observed around the entire circumference at both fractures in the screw. Structure at top is the base metal; structure at bottom is cadmium plating. Original magnification: 1000×. Source: Ref 20 More

Fig. 21 Intergranular fracture from hydrogen embrittlement, as seen through the SEM More

Fig. 18.4 Intergranular fracture of type 304 austenitic stainless steel following exposure to an aqueous CuSO 4 + H 2 SO 4 solution. (a) Primary rupture plane is shown intersecting the surface. Note the secondary intergranular cracks. Original magnification: 650×. (b) Classic intergranular More

Fig. 42 Intergranular fracture in hardened steel, viewed under the scanning electron microscope. Note that fracture takes place between the grains; thus, the fracture surface has a “rock candy” appearance that reveals the shapes of part of the individual grains. Original magnification: 2000 More

Fig. 43 Schematic illustrating intergranular fracture along grain boundaries. (a) Decohesion along grain boundaries of equiaxed grains. (b) Decohesion through a weak grain-boundary phase. (c) Decohesion along grain boundaries of elongated grains. Source: Ref 18 More

Fig. 44 Intergranular fracture in an AISI 8740 steel nut due to hydrogen embrittlement. Failure was due to inadequate baking following cadmium plating; thus, hydrogen, which was picked up during the plating process, was not released. (a) Macrograph of fracture surface. (b) Higher-magnification More

Fig. 8 Intergranular fracture in hardened steel, viewed under the scanning electron microscope. Note that fracture takes place between the grains; thus the fracture surface has a “rock-candy” appearance that reveals the shapes of part of the individual grains. Original magnification at 2000× More

Fig. 16 Example of hydrogen-embrittled steel. Intergranular fracture in an AISI 4130 steel heat treated to an ultimate tensile strength of 1281 MPa (186 ksi) and stressed at 980 MPa (142 ksi) while being charged with hydrogen More

Fig. 16.19 Scanning electron microscope (SEM) images of (a) intergranular fracture in the ion-nitrided surface layer of a ductile iron (ASTM 80-55-06), (b) transgranular fracture by cleavage in ductile iron (ASTM 80-55-06), and (c) ductile fracture with equiaxed dimples from microvoid More

Fig. 10 SEM image of center of fisheye showing intergranular fracture More

Fig. 2.15 Intergranular fracture of the lug More

Fig. 4.11 SEM fractograph of an intergranular fracture caused by hydrogen embrittlement in a high-strength steel component More

Fig. CH2.3 SEM fractograph showing intergranular fracture at the leading edge of the LPTR blade More

Fig. CH3.3 SEM fractograph showing intergranular fracture More

Fig. 29 Scanning electron micrograph showing primarily intergranular fracture morphology. 75× More

Fig. 11 Intergranular fracture in case unstable crack propagation zone in gas-carburized and direct-cooled SAE 4320 steel More