ABSTRACT
The thousands of cycles-to-failure for 35 grooved specimens of AISI 4340 steel, 35/40 hardness, subjected to fatigue tests under loads of combined reversed bending and steady torque [1,2] are contained in Table 43.1. The two-parameter lognormal model was suggested for the analysis [1,2]. Cycles-to-Failure (10<sup>3</sup>) for 35 Steel Specimens
61.667
62.882
68.394
69.342
69.372
71.179
71.268
71.624
71.713
72.039
72.305
76.602
77.817
78.262
80.010
84.218
84.544
85.433
85.788
87.152
88.337
89.759
89.789
90.767
90.797
91.923
96.131
98.679
99.853
100.960
102.620
110.800
112.580
126.030
127.690
