Search Results for crack propagation

Fig. 1 Crack propagation mechanisms: (a) Cleavage crack propagation. (b) Dimple fracture due to coarse particles. (c) Dimple fracture due to fine particles. (d) Dimple fracture due to coarse and fine particles. (e) Intergranular crack propagation due to grain boundary precipitates. (f More

Fig. 1 Crack propagation mechanisms: (a) cleavage crack propagation. (b) Dimple fracture due to coarse particles. (c) Dimple fracture due to fine particles. (d) Dimple fracture due to coarse and fine particles. (e) Intergranular crack propagation due to grain boundary precipitates. (f More

Fig. 23 Mechanism of fatigue crack propagation by alternate slip at the crack tip. Sketches are simplified to clarify the basic concepts. (a) Crack opening and crack tip blunting by slip on alternate slip planes with increasing tensile stress. (b) Crack closure and crack tip resharpening More

Fig. 15 A crack-blunting mechanism resulting from crack propagation into grain boundary ferrite in proeutectoid alloys. Courtesy of American Society for Testing and Materials More

Fig. 24 Mechanism of fatigue crack propagation by alternate slip at the crack tip. Sketches are simplified to clarify the basic concepts. (a) Crack opening and crack-tip blunting by slip on alternate slip planes with increasing tensile stress. (b) Crack closure and crack-tip resharpening More

Fig. 8 Gross section stress at initiation of unstable crack propagation vs. crack length for wide sheet panels of four aluminum alloy/temper combinations. Source: Ref 13 More

Fig. 28 Observed and theoretical crack-propagation rate versus crack-tip strain-rate relationships for sensitized type 304 stainless steel in oxygenated water at 288 °C (550 °F). EPR, electrochemical potentiokinetic repassivation. Source: Ref 38 , 59 More

Fig. 29 Observed and theoretical crack-propagation rate versus crack-tip strain-rate relationships for stainless steel in aerated and deaerated water. Source: Ref 38 , 59 More

Fig. 2 Schematic of typical crack propagation rate as a function of crack tip stress-intensity behavior illustrating the regions of stages 1, 2, and 3 crack propagation, as well as identifying the plateau velocity and the threshold stress intensity More

Fig. 10 Crack tip stress-intensity control of fatigue crack propagation in 7075-T6 aluminum alloy sheet—long-transverse loading. Remote and wedge force methods of loading specimens in aqueous 3.5% sodium chloride environment and benign dry air environment. Source: Ref 46 More

Fig. 19 Gross section stress at initiation of unstable crack propagation vs. crack length for wide sheet panels of four aluminum alloy/temper combinations. Fty, specified tensile yield strength. Source: Ref 43 More

Fig. 39 (a) Fatigue crack propagation regimes and (b) crack growth rates of wrought aluminum alloys. L-T, longitudinal transverse; T-L, transverse longitudinal. Source: Ref 65 More

Fig. 43 Predicted and observed crack-propagation rate/crack-tip strain-rate relationships for sensitized type 304 stainless steel in 8 ppm oxygenated, 0.5 μS · cm −1 purity water at 288 °C More

Fig. 44 Predicted and observed crack-propagation rate/crack-tip strain-rate relationships for stainless steels in a variety of material/environment systems More

Fig. 15 Mechanism of fatigue crack propagation by alternate slip at the crack tip. Sketches are simplified to clarify the basic concepts. (a) Crack opening and crack tip blunting by slip on alternate slip planes with increasing tensile stress. (b) Crack closure and crack tip resharpening More

Fig. 1088 Transgranular corrosion-fatigue crack propagation in a solution-treated and peak-aged Al-5.6Zn-1.9Mg sample tested in humid nitrogen gas. Compare with Fig. 1091 and 1092 . SEM, 5000× (R.E. Ricker, University of Notre Dame, and D.J. Duquette, Rensselaer Polytechnic Institute) More

Fig. 1317 Quasi-brittle fatigue crack propagation in 3.2-mm (0.13-in.) thick polycarbonate sheet. Arrow indicates direction of crack growth. At this thickness, polycarbonate shows features characteristic of both brittle (microcracking) and ductile (thinning and fibrillation) fracture. Note More

Fig. 593 Effect of inclusions on fatigue crack propagation (FCP) in ASTM A533B. Fractograph shows compact and well-dispersed type III MnS inclusions in calcium-treated electric furnace steel, through-thickness (S-L) orientation. Balance of inclusions were round, calcium-modified duplex types More

Fig. 594 Effect of inclusions on fatigue crack propagation (FCP) in ASTM A533B. Ductile fatigue striations and secondary cracking are present in this area remote from inclusion formations. Conventional electric furnace heat; L-T orientation; Δ K = 46 MPa m (42 ksi More

Fig. 42 Radial marks typical of crack propagation that is fastest at the surface (if propagation is uninfluenced by the configuration of part or specimen) More