ABSTRACT
Table 41 Effect of Cyclic Speed on Endurance of Lead Alloy Under Conditions of Rotating Flexure [2,238]. (Courtesy of Springer Verlag. New York.)
Cycles to failure at Time to failure (h) at Strain 3000 1.35 3000 1.35
Material (%) cycles/min cycles/min cycles/min cycles/min Pure lead 0.1 0.09 X 106 4,700 0.5 58 Pb-0.2% Sn 0.1 0.2 X 106 16,600 1.1 205 Pb-0.2% Sn-0.85% Sb 0.1 1.0 X 106 100.000 5.5 1,230
Figure 82 Relation between fatigue life in units of time and the frequency at two different alternating strain levels [2,241]. (Courtesy of Springer Verlag, New York.)
Table 42 Fatigue Resistance of Extruded Lead and Lead Alloys in Direct-Stress Tests [2,238]. (Courtesy of Springer Verlag, New York.)
Endurance limit at 107 cycles, ±MPa
Material
Pure lead Lead + 0.06% Te Lead + 1.5% Sn + 0.25% Cd Lead + 0.5% Sn + 0.25% Cd
At room temperature
2.8 7.6 8.8
11.5
1.2 5.1 4.3 6.2
Table 43 Effect of Grain-Size on the Fatigue-Resistance of the Lead-0.85% Antimony Alloy [2,200]. (Courtesy of Springer Verlag, New York.) Extrusion temp. (0C)
160 200 250 300
Average grain area (mm2)
0.0039 0.012 0.043 0.19
Endurance limit (±MPa)
extruded flat bars are recommended. However, in predictions of actual service performance, test piece geometry and testing conditions should be simulated as closely as possible.
