Search Results for Crack initiation

Fig. 89 Crack-initiation locations in compression loading. Crack initiation may occur along the centerline and at the surface on a hoop plane. Further deformation may close the centerline crack. More

Fig. 89 Crack-initiation locations in compression loading. Crack initiation can occur along the centerline and at the surface on a hoop plane. Further deformation can close the centerline crack. More

Fig. 4 Low magnification SEM micrograph of the crack initiation site, with crack arrest markings noted More

Fig. 20 Examples of fatigue crack initiation below the surface. (a) Crack initiation (CI) at the interface of a case-hardened shaft and (b) at an embedded oxide in a helical spring. CP, crack propagation; FF, final fracture More

Fig. 15 Crack initiation on type 316LR stainless steel dynamic compression plate. (a) Anterior-posterior radiograph. The plate was used to treat the nonunion of a fracture between the fourth and seventh screws. The plate was bent intraoperatively to fit the contour of the bone. (b) Radiograph More

Fig. 13 Fatigue-crack initiation in polystyrene from a V-notch. Note crazes surrounding and preceding the crack. 37× More

Fig. 34 Fatigue-crack-initiation behavior of various steels at a stress ratio of +0.1. Source: Ref 9 More

Fig. 35 Dependence of fatigue-crack-initiation threshold on yield strength More

Fig. 60 SEM micrograph showing (a) overall fracture surface in crack initiation area and (b) detail at area C in (a), showing shrinkage porosity More

Fig. 70 Close-up view of the crack-initiation area in Fig. 69 , showing slag inclusions (dark spots). ∼10× More

Fig. 4 Optical micrograph showing crack initiation in a region of underdeposit attack More

Fig. 8 Low-magnification micrograph of crack initiation region at base of capture lip in a titanium alloy tibial component. More

Fig. 6 Crack initiation site, showing untempered martensite. More

Fig. 5 Higher-magnification view of the multiple crack initiation site shown in Fig. 4 . Extensive crack branching is visible. 400×. More

Fig. 5 Closeup view of the crack initiation area in Fig. 4 . The dark spots are slag inclusions. 11×. More

Fig. 6 Closeup view of fracture surface in Fig. 5 , showing a crack initiation area at a sharp radius between the base metal and the filler meterial.The top half (122×) is an enlarged view of the rectangle in the bottom hen (12×). More

Fig. 4 Micrograph showing cracks at the toes of weld indicating crack initiation from both outside and inside surfaces (magnification of smaller picture is 16×) More

Fig. 9 SEM image of crack initiation region A More

Fig. 5 SEM micrograph depicting the crack initiation area, with evidence of secondary cracking and intergranular fracture More

Fig. 8 Crack initiation and propagation in the groove of the flange: ( a ) overall crack profile and crack propagation path, ( b ) multiple crack initiation on the surface (arrows), and ( c ) and ( d ) transgranular crack propagation near the surface and in the bulk material, respectively More