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. 29 Comparison of determination of K ISCC by crack initiation versus crack arrest. (a) Constant-load test. (b) Constant crack-opening displacement test. a 0 = depth of precrack associated with the initial stress intensity K Io ; V pl = plateau velocity 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. 13 Stages of fatigue crack growth. Stage I includes crack initiation and can account for up to 90% of the fatigue crack life. Stage II is the striation-growth regions, and stage III includes the transition to overload fracture. Adapted from Ref 46 More

Fig. 16 Crack initiation in the edge areas of a copper induction coil. Source: Ref 15 More

Fig. 11 Subsurface fatigue crack initiation in a heavy section low-alloy steel casting. Original magnification: 6×. Courtesy of Stork Technimet, Inc. New Berlin, WI More

Fig. 3 Corrosion (active path dissolution) action and crack initiation under cyclic mechanical loading. Refer to text for a discussion of stages (a) through (d). More

Fig. 2 Sequence of crack initiation, coalescence, and growth during subcritical cracking in aqueous environments. Note that “engineering initiation” corresponds to crack dimensions equal to crack detection capabilities, i.e., function of crack resolution and probability of detection. Source More

Fig. 22 Effect of potential on crack initiation stress for α + β titanium alloys in various halide solutions at 25 °C (77 °F) ( Ref 220 ) More

Fig. 25 The effect of chloride on the corrosion fatigue crack initiation resistance of notched steel specimens. r , notch tip radius. Source: Ref 20 More

Fig. 36 Fatigue crack initiation behavior of various steels at a stress ratio of +0.1. Source Ref 17 More

Fig. 37 Dependence of fatigue crack initiation threshold on yield strength. Source: Ref 51 More

Fig. 10 Intergranular bending fatigue crack initiation at the surface of a gas-carburized and direct-cooled SAE 8219 steel specimen. Source: Ref 42 More

Fig. 19 Bending fatigue crack initiation in gas-carburized and reheated 4320 steel. The dashed line corresponds to maximum depth of surface oxidation, and all fracture below dashed line is transgranular. Source: Ref 49 More

Fig. 29 Effect of the truncation level ( S a,max ) on the crack initiation period (until a = 2 mm) and the crack growth period. Results of flight simulation tests on 2024-T3 sheet specimens with a central hole. Source: Ref 63 More

Fig. 50 Predicted versus actual blocks to crack initiation. Source: Ref 28 More

Fig. 2 Conceptual drawing of fatigue crack initiation and growth at the toe of (left) a “Nominal” groove welded butt joint having a substantial (≈ 0.1 in. depth) weld discontinuity (slag entrapment) at the root of the critical notch (weld toe) and (right) an “Ideal” weldment with good wetting More

Fig. 13 Number of cycles to crack initiation for X4 CrMnNiMoN2664 in NaCl solution, pH 7 and pH 2. Source: Ref 44 More

Fig. 8 Intergranular crack initiation site from bending fatigue of plasma-carburized steel containing 1.06% Mn, 0.52% Cr, 0.30% Ni, and 0.1% Mo. Source: Ref 2 More