The fatigue data for a steel alloy are given as follows: a) Make an S—N plot (stress amplitude versus logarithm cycles to failure) using these data. b) What is the fatigue limit for this alloy? c) Determine fatigue lifetimes at stress amplitudes of 415 MPa (60,000 psi) and 275 MPa (40,000 psi). d) Estimate fatigue strengths at 2 × 104 and 6 × 105 cycles.

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answer:

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explanation:

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