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Correlation of substructure with time-dependent fatigue properties of aisi304 stainless steel

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Abstract

Transmission electron microscopy was employed to study the substructure of AISI 304 stainless steel tested at 482, 593, and 650 °C in low-cycle fatigue with various hold times. Total strains investigated ranged from 0.5 to 2.0 pct, strain rates of 4 E-03 and 4 E-05 s-1. The cell size was found to be inversely related to the relaxed tensile saturation stress, but with different constants of proportionality for the two strain rates. At the lower strain rate, substructures tended to resemble those produced by pure creep. A modified work-hardening theory was used to relate the peak saturation stress to both plastic strain and cell size.

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Authors and Affiliations

  1. Materials Science and Metallurgical Engineering Department, University of Cincinnati, 45221, Cincinnati, OH

    A. M. Ermi (Graduate Student) & John Moteff (Professor and Head)

Authors
  1. A. M. Ermi
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  2. John Moteff
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Mr. Ermi is presently with Hanford Engineering Development Laboratory, Richland, WA 99352.

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Ermi, A.M., Moteff, J. Correlation of substructure with time-dependent fatigue properties of aisi304 stainless steel. Metall Trans A 13, 1577–1588 (1982). https://doi.org/10.1007/BF02644798

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  • DOI: https://doi.org/10.1007/BF02644798

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