Elevated-temperature low-cycle fatigue behavior of different heats of type 304 stainless steel |
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Authors: | P S Maiya S Majumdar |
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Affiliation: | (1) Materials Science Division, Argonne National Laboratory, 60439 Argonne, IL |
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Abstract: | The low-cycle fatigue results of three heats of Type 304 stainless steel have been ob-tained at 593°C under selected cyclic-loading
conditions. The results are compared with those generated for a reference heat of steel for which extensive low-cycle fatigue
data are available. Observation of the microstructures of specimens in the pretest condition after a given heat treatment
and examination of fatigue fracture surfaces were con-ducted by means of optical and scanning electron microscopy and X-ray
analysis. The three heats of stainless steel, which exhibit different microstructural features, show approximately the same
continuous-cycling low-cycle fatigue behavior as that of the re-ference heat. However, the three materials show improved fatigue
strength during tensile hold-time conditions where significant creep occurs. The fatigue properties determined in the present
study for the different heats of steel are consistent with the observed mi-crostructural features. Finally, the creep-fatigue
properties of the heats as well as the microstructural observations are discussed in terms of a damage-rate approach re-cently
developed by the authors. |
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Keywords: | |
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