By Howard E. Boyer
Comprises greater than 500 fatigue curves for business ferrous and nonferrous alloys. additionally encompasses a thorough rationalization of fatigue trying out and interpretation of try out effects. every one curve is gifted independently and contains a proof of its specific significance. The curves are titled via regular commercial designations (AISI, CDA, AA, etc.) of the metals, and an entire reference is given to the unique resource to facilitate additional study. the gathering comprises average S-N curves, curves displaying impression of floor hardening on fatigue power, crack growth-rate curves, curves evaluating the fatigue strengths of assorted alloys, influence of variables (i.e. temperature, humidity, frequency, getting older, setting, etc.) and lots more and plenty, even more. This one quantity consolidates vital and hard-to-find fatigue facts in one accomplished resource.
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Extra resources for Atlas of Fatigue Curves
Faugue m hlachlner and StrucrtmpGround Metals Park OH. IYTY. p 6’ Amencan So&l! ior hkrals. ” in Fatigue and hlwrosrruc~ure. 1-14. Strain- Life and Stress- Life Curves 2Nf Reversals to failure (lag scale) Strain-life and stress-life curves, Fatigue damage is caused by cyclic plastic strain, and consequently, the fatigue life should be related to the plastic-strain amplitude. Coffin and Manson independently proposed a relationship between the plastic-strain amplitude and the cycles to failure of the form: AEp/ 2 = EJ (2NJ), where Ej is the fatigue-ductility coefficient, 2NJ is the number of reversals to failure, and c is the fatigue-ductility exponent.
Below 40 HRC, the carbides in the martensite are spheroidal. Above 40 HRC, the carbide associated with the bainite was very fine and well-distributed, but below 40 HRC the carbides had a "pearlitic mode," which was less favorable in resisting fatigue. Source: D. H. Breen and E. M. Wene, "Fatigue in Machines and Structures-Ground Vehicles," in Fatigue and Microstructure. American Society for Metals, Metals Park OH, 1979,P 77 31 32 l-5. Steel: Influence of Derating Factors on Fatigue Characteristics Derating factors for influence of surface condition on fatigue.
They concluded that above 40 HRC, bainite had better fatigue properties at the same hardness than did martensite, whereas below 40 HRC the reverse was true. They explained the results in terms of carbide morphology and distribution. Below 40 HRC, the carbides in the martensite are spheroidal. Above 40 HRC, the carbide associated with the bainite was very fine and well-distributed, but below 40 HRC the carbides had a "pearlitic mode," which was less favorable in resisting fatigue. Source: D. H. Breen and E.
Atlas of Fatigue Curves by Howard E. Boyer