Fig. 4-6. Helical gear, 1.12×. Tooth bending fatigue followed by tooth bending impact. Origin is off-center of the tooth midpoint but is directly above the center of the web. More

Fig. 3.1 Wöhler’s rotating-cantilever, bending fatigue-testing machine. D , drive pulley; C , arbor; T , tapered specimen butt; S , specimen; a , moment arm; G , loading bearing; P , loading spring. Source: Ref 3.2 More

Fig. 11.34 The effect of various machining processes on the bending fatigue strength of Ti-5Al-2.5Sn alloy. Source: Ref 11.40 More

Fig. 11.61 The effect of grinding and peening on reverse-bending fatigue strengths of flat steel bars (hardness 45 HRC, or 421 HB). Source: Ref 11.70 More

Fig. 5.16 Core hardness vs. bending fatigue strength of gear tooth More

Fig. 5.17 Austenitic grain size and bending fatigue strength of a typical gear steel More

Fig. 5.27 Influence of retained austenite on bending fatigue strength More

Fig. 6.5 Bending-fatigue life of original and damaged carburized and hardened gears More

Fig. 6.6 Bending-fatigue life of original and damaged nitrided gears More

Fig. 5.21 Hardness, retained austenite, microcrack density, and bending fatigue curves for carburized and hardened SAE 8620 steel quenched by three methods: direct quench, ASTM 1-3 grain size; single reheat, ASTM 4-5 grain size; double reheat. Source: Ref 43 More

Fig. 5.44 Rotating bending fatigue of samples initiated by B (alumina, irregular), D (calcium aluminate, spherical), and T (titanium carbonitride, cuboid) type inclusions in an SAE 52100 steel. Source: Ref 65 More

Fig. 6.30 Effect of nickel content and case depth on the bending fatigue strength of case-hardened steels. Source: Ref 36 More

Fig. 6.38 Alternating bending fatigue strength of carburized test pieces in relation to case depth and section ratio. (a) 6 mm diam. (b) 12 mm diam. Source: Ref 40 More

Fig. 7.13 Effect of tempering temperature on the alternating bending fatigue strength of 6 mm diam case-hardened test pieces. Carburized at 930 °C for 1 h, water quenched, reheated to 850 °C for 10 minutes, and oil quenched. Note: Ck15 steel was water quenched from 850 °C. Source: Ref 25 More

Fig. 7.15 Bending-fatigue strength of notched test pieces with and without retained austenite. Source: Ref 29 More

Fig. 7.16 Effect of tempering on the alternating bending-fatigue strength of two case-hardened steels. Source: Ref 25 More

Fig. 7.26 Bending-fatigue strength of a carburized SAE 8620 steel (6.35 mm diam). Source: Ref 47 More

Fig. 8.14 Comparison of bending fatigue strength of conventionally processed (cut/harden/lap) versus CBN ground (cut/harden/lap) spiral bevel gears. Test gear design specifications: hypoid design, 4.286 dp, 11 by 45 ratio, 1.60 in. face. Gears were installed in axles using a 4-square loaded More

Fig. 8.16 Effect of local case thinning by grinding on the bending fatigue strength of Ni-Cr steel gear teeth. Source: Ref 16 More