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Fatigue crack propagation in iron and Fe-Mo solid solution alloys (77 to 296 K)

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Abstract

Fatigue crack propagation data were obtained for iron and Fe-Mo solid solution alloys through the ductile-brittle transition temperature (77 to 296 K). The fatigue crack growth rates were found to decrease with decreasing temperature for each alloy and to decrease with increasing solute content at 296 K but to increase with solute content at 77 K. These results are discussed in terms of the wide range of mechanical properties observed for the materials. It is shown that the fatigue crack growth rates are inversely proportional to a plastic work term and the square of a characteristic stress approximated by the yield or ultimate stress.

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Formerly Research Assistant at Materials Science and Engineering Department and Materials Research Center, Northwestern University, Evanston, Ill.

This paper is based on a thesis submitted by L. H. Burck in partial fulfillment of the requirements of the degree of Doctor of Philosophy at Northwestern University.

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Burck, L.H., Weertman, J. Fatigue crack propagation in iron and Fe-Mo solid solution alloys (77 to 296 K). Metall Trans A 7, 257–264 (1976). https://doi.org/10.1007/BF02644465

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