Fig. 2 Examples of the dimple rupture mode of fracture. (a) Large and small dimples on the fracture surface of a martempered type 234 tool steel saw disk. The extremely small dimples at top left are nucieated by numerous, closely spaced particles. (D.-W. Huang, Fuxin Mining Institute, and C.R More

Fig. 5 Examples of the dimple rupture mode of fracture. (a) Large and small dimples on the fracture surface of a martensitic type 234 tool steel saw disk. The extremely small dimples at top left are nucleated by numerous closely spaced particles. (b) Large and small sulfide inclusions in steel More

Fig. 18 SEM fractograph for type 304 aged at 566 °C. Transgranular dimple rupture is dominant, but limited intergranular cracking (denoted by arrows) is also observed. Source: Ref 94 More

Fig. 3 Intergranular dimple rupture in a steel specimen resulting from microvoid coalescence at grain boundaries. More

Fig. 62 Effect of balanced biaxial tension on dimple rupture in a hot-rolled basal-textured Ti-6Al-4V alloy. The dimples on the biaxially fractured specimen (b) are smaller and more shallow when compared to the uniaxially fractured specimen (b). Source: Ref 196 More

Fig. 76 Intergranular dimple rupture in a Ti-6Al-2Nb-1Ta-0.8Ta alloy tested at 800 °F (1470 °F). The fracture path in this alloy, tensile tested at a strain rate of about 3.3 × 10 −4 s −1 , changes at 800 °C (1470 °F) from a predominantly transgranular dimple at room temperature (not shown More

Fig. 78 Effect of a 15-min 800- °C (1470- °F) air exposure on a dimple rupture fracture surface of an annealed Ti-6Al-6V-2Sn alloy. (a) Fracture appearance before exposure. (b) The identical fracture surface after exposure. The oxide buildup is so great that it is impossible to identify More

Fig. 1 SEM images of dimple-rupture fractures. (a) Fracture of low-alloy medium-carbon steel bolt (SAE grade 5). 1750×. (b) Equiaxed tensile dimples originating around the graphite nodules of ASTM 60-45-10 ductile iron. 350×. (c) Parabolic shear dimples in cast Ti-6Al-4V from torsional loading More

Fig. 1 Scanning electron microscopy images of dimple-rupture fractures. (a) Fracture of low-alloy medium-carbon steel bolt (SAE grade 5). Original magnification: 1750×. (b) Equiaxed tensile dimples originating around the graphite nodules of ASTM 60-45-10 ductile iron. Original magnification More

Fig. 3 Dimple rupture fracture features at 1500× from a tensile bar of wrought aluminum. In (a), the fracture surface is oriented perpendicular to the incident electron beam. In (b), the fracture surface is oriented at an approximately 45° angle to the incident electron beam. More

Fig. 7 Dimple rupture fracture features from a wrought aluminum tensile specimen imaged at 2000× using (a) secondary electron mode and (b) backscattered electron shadow mode More

Fig. 8 Dimple rupture fracture features from a laboratory-created impact fracture of a brass alloy water valve imaged at 1000× using (a) secondary electron mode and (b) backscattered electron compositional mode More

Fig. 9 Dimple rupture fracture features from the obliquely angled shear lip at the fracture perimeter for the same wrought aluminum tensile specimen shown in Fig. 7 imaged at 1000× using (a) secondary electron mode and (b) backscattered electron shadow mode More

Fig. 11 Stages in the dimpled rupture mode of ductile fracture. (a) Void initiation at hard particles. (b) Void growth. (c) Void linking More

Fig. 14 Stages in the dimpled rupture mode of ductile fracture. (a) Void initiation at hard particles. (b) Void growth. (c) Void linking More

Fig. 9 Dimpled rupture created by microvoid coalescence in a quenched and tempered steel. Note the presence of carbide particles in the bottom of several dimples. Palladium shadowed two-stage carbon replica. Because the image is a replica of the fracture surface, there is a reversal More

Fig. 10 Dimpled rupture created by microvoid coalescence. Courtesy of Engineering Systems, Inc. More

Fig. 3 Micrograph of dimpled rupture observed on the fracture surface of a 2024-T4 alloy. SEM; original magnification: 247× More

Fig. 4 Micrograph of dimpled rupture observed on the fracture surface of a 6 xxx -series alloy. SEM; original magnification: 1000× More

Fig. 5 Dimpled rupture on the fracture surface of a 6101 aluminum alloy in the T4 temper. Source: Ref 3 More