Search Results for fatigue limit

Fig. 19 Relation of fatigue limit under repeated tension to fatigue limit under reversed tension-compression. Q&T, quenched and tempered. Source: Ref 7 More

Fig. 6 Goodman diagram of 10 7 cycle fatigue limit for 4.2 mm Si-Cr (ASTM A401) wire compression spring More

Fig. 14 Relation of tensile strength and fatigue limit for stainless steels and quenched-and-tempered (Q&T) structural steels. (a) Tensile strengths vs. reversed tension-compression ( R = −1) fatigue. (b) Repeated tension fatigue ( R = 0) vs. tensile strength. Source: Ref 7 More

Fig. 20 Fatigue limit diagram relating stress amplitude and mean stress of materials at different tensile strength levels. Source: Ref 7 More

Fig. 1 Schematic S-N representation of materials having fatigue limit behavior (asymptotically leveling off) and those displaying a fatigue strength response (continuously decreasing characteristics) More

Fig. 3 S - N curve with extrapolations below the fatigue limit More

Fig. 3 Fatigue limit of cracked copper plate. Source: Ref 3 More

Fig. 28 Notched and unnotched fatigue limit of Ti-6Al-4V. 6.35 mm (0.25 in.) specimens cut from asrolled bar, solution treated at indicated temperatures, and cooled at various rates (furnace, air, water quench). Rotating-beam fatigue at 8000 rpm. Fatigue limits at 10 7 cycles determined More

Fig. 6 Fatigue limit at 2 million cycles versus defect size and process route for tool steels. Fatigue limit for various tool steels at 60–62 HRC. R =0. P/M, powder metallurgy; ESR, electroslag remelt; SF, spray forming. Source: Ref 2 More

Fig. 80 Ratio at various temperatures of fatigue limit to tensile strength for molybdenum More

Fig. 18 Brinell hardness versus fatigue limit for ductile iron shows data scatter that a prediction of fatigue unreliable. Source: Ref 29 More

Fig. 5 Effect of surface condition on fatigue limit. (a) Effect of surface condition on fatigue behavior of steels that were hardened and tempered to 269 to 285 HB. (b) Effect of tensile strength level and surface condition of steel on fatigue limit; strengths are given for 10 6 cycle fatigue More

Fig. 16 Effect of carbon content and hardness on fatigue limit of through-hardened and tempered 4140, 4053, and 4063 steels. See the sections “Composition” and “Scatter of Data” in this article for additional discussions. More

Fig. 22 Effect of martensite content on fatigue limit. Data are based on standard rotating-beam fatigue specimens of alloy steels 6.3 mm (0.250 in.) in diameter with polished surfaces. More

Fig. 24 Effect of specimen orientation on fatigue limit. Orientations are relative to the fiber axis resulting from hot working on the fatigue limit of low-alloy steels. Through-hardened and tempered specimens, 6.3 mm (0.250 in.) in diameter, were taken from production billets. Specimens More

Fig. 26 Scatter of fatigue limit data. Based on the survival after 10 million cycles of approximately 1000 specimens, at one heat, of AISI-SAE 4340 steel with tensile strengths of 995, 1320, and 1840 MPa (144, 191, and 267 ksi). Rotating-beam fatigue specimens tested at 10,000 to 11,000 rev More

Fig. 27 Variations in fatigue limit for different heats and heat treatments Specimen (a) Hardness, HRC Tensile strength Yield strength Elongation in 50 mm (2 in.), % Reduction of area, % MPa ksi MPa ksi Five heats, same heat treatment A 39.1 1250 181 1205 More

Fig. 7 There is a pronounced maxima in the fatigue limit for martensitic structures, while the fatigue limit of bainitic steel continues to increase to maximum bainitic hardness. Source: Ref 3 More

Fig. 6 Relationship between rotating-bending fatigue limit and tensile strength for through-hardened steels. Source: Ref 1 More

Fig. 54 Bending fatigue limit loads. Source: Ref 49 More