Search Results for low-cycle fatigue

Fig. 38 Relative range of ultralow-cycle fatigue, low-cycle fatigue, high-cycle fatigue, and very-high-cycle fatigue More

Fig. 20 Transition from low-cycle fatigue to high-cycle fatigue for carbon steel plate. Source: Ref 44 More

Fig. 16 Intermingled dimples and fatigue striations in low-cycle fatigue test fractures in aluminum alloy 2024-T851 at a high range of stress intensity (Δ K ) at the crack tip. Orientation of fatigue striations differs from patch to patch, particularly in fractograph (a). Dimples More

Fig. 43 Intermingled dimples and fatigue striations in low-cycle-fatigue test fractures in aluminum alloy 2024-T851 at a high range of stress intensity (Δ K ) at the crack tip. Orientation of fatigue striations differs from patch to patch, particularly in fractograph (a). Dimples More

Fig. 33 Fatigue fracture surface in the Paris regime following low-cycle fatigue testing of fully equiaxed Ti-6Al-4V. The overall crack-propagation direction is left to right, but arrows denote that the local crack-growth direction deviates significantly due to the underlying orientation More

Fig. 1021 Cone-shaped fracture surface produced by low-cycle fatigue in aluminum alloy 7075-T6 (same mechanical properties as in Fig. 1015 ). Loading was tension-tension with R = 0.1 and a maximum loading of 310 MPa (45 ksi). Fracture occurred at 26,000 cycles. See also Fig. 1022 More

Fig. 413 Surface of a low-cycle fatigue fracture in an aircraft landing-gear cylinder made of AISI 4340 steel that was hardened and tempered to a tensile strength of 1793 to 1931 MPa (260 to 280 ksi). The cylinder was stressed in the laboratory to its tensile strength four times and broke More

Fig. 726 Low-cycle fatigue fracture in threaded specimen of 13-8 PH stainless steel (tensile strength): 1634 MPa, or 237 ksi; 47% reduction of area) tested in tension-tension ( R = 0.1) with maximum loading at 60% of tensile strength. Fracture, at 16,000 cycles, began at lower edge More

Fig. 769 Surface of a low-cycle fatigue fracture in the collar of a rivet-heading tool of AISI S1 tool steel heat treated to a hardness of 56 to 58 HRC. Following the development of the smooth fatigue zone at right, fracture occurred in a few hours of service, generating the unusual beach More

Fig. 781 Low-cycle fatigue fracture in threaded specimen of AISI H11 tool steel (same heat treatment and tensile strength as in Fig. 774 ) that broke after 21,000 cycles of tension-tension ( R = 0.1); maximum load, 60% of tensile strength. Region A-A is fatigue portion of fracture. See also More

Fig. 812 A low-cycle fatigue fracture (at about 3000 cycles) of 18% Ni, grade 300, maraging steel that had been annealed 1 h at 815 °C (1500 °F) and air cooled. There is no evidence of clearly defined striations, but there is a system of more or less parallel secondary cracks. See also Fig More

Fig. 813 A view of a different area of the low cycle fatigue fracture if Fig. 812 . Note that in this area quite regular striations are in evidence, many of them with fissures at their roots (as at A). Note also the several rubbed areas, particularly those at the top. See also Fig. 814 . SEM More

Fig. 815 Surface of a low-cycle fatigue fracture (at about 1000 cycles) in 18% Ni, grade 300, maraging steel that had been aged at 480 °C (900 °F) for 3 h and air cooled. This fracture surface displays a progression of rather fine but extremely irregular striations, separated here More

Fig. 816 Low-cycle fatigue fracture of 18% Ni, grade 300, maraging steel (heat treatment not reported). This has relatively uniformly spaced fatigue striations with fewer secondary cracks than are seen in Fig. 812 , 813 , 814 , and 815 . The pattern of striations is similar More

Fig. 4 Typical plot of strain range versus cycles to failure for low-cycle fatigue. Δε t , total strain range; Δε e , elastic strain range; Δε p , plastic strain range More

Fig. 18 Low-cycle fatigue curves for superalloys at 850 °C (1560 °F). Superalloys used under high-load, high-temperature situations frequently are characterized in the safe-life, finite-life regime. This comparison shows that different alloys can be “better” depending on the specific life More

Fig. 5 Fracture surface due to low cycle fatigue from polyethylene terephthalate (PET) toothbrush More

Fig. 9 Example of low-cycle fatigue curve for a die-cast aluminum alloy More

Fig. 4 Effect of frequency of cycling on the low-cycle fatigue behavior of lead More

Fig. 17 Low-cycle fatigue life of as-HIP PM AF115 at 635 °C (1175 °F). HIP: 1180 °C (2155 °F)/3 h/102 MPa (15 ksi). Heat treatment: 1175 °C (2150 °F) + 760 °C (1400 °F) air cool. Source: Ref 42 More