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Title: Cyclic deformation behavior of Type 304 stainless steel at elevated temperature

Abstract

Samples of 304 stainless steel were subjected to a variety of deformation histories at 300 and 560/sup 0/C. The deformation histories included both periods of constant stress amplitude cyclic loading and constant strain rate tensile deformation. It was found that changes in the plastic strain amplitude during cycling were not always correlated with changes in the tensile flow stress. This indicates that a mechanical equation of state based on the flow stress as the only state variable cannot adequately describe the mechanical behavior of 304 stainless steel at these temperatures. Transmission electron microscopy on deformed samples showed that an increase in the plastic strain amplitude during cycling at constant stress amplitude was correlated with the rearrangement of the dislocations into a tight cellular structure. This rearrangement was found to have no effect on the tensile deformation behavior of the material beyond a brief transient. It is suggested that another state variable, in addition to the flow stress, be introduced into the equation of state formulation to allow the description of the observed cyclic behavior. This additional state variable would be associated with the arrangement of the dislocations in the material.

Authors:
Publication Date:
Research Org.:
Argonne National Lab., IL
OSTI Identifier:
6171641
Resource Type:
Journal Article
Journal Name:
Metall. Trans., A; (United States)
Additional Journal Information:
Journal Volume: 10:2
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; STAINLESS STEEL-304; DEFORMATION; MICROSTRUCTURE; PLASTICITY; STRAINS; STRESSES; TENSILE PROPERTIES; THERMAL CYCLING; ALLOYS; CHROMIUM ALLOYS; CHROMIUM STEELS; CHROMIUM-NICKEL STEELS; CORROSION RESISTANT ALLOYS; CRYSTAL STRUCTURE; HEAT RESISTANT MATERIALS; HEAT RESISTING ALLOYS; IRON ALLOYS; IRON BASE ALLOYS; MATERIALS; MECHANICAL PROPERTIES; NICKEL ALLOYS; STAINLESS STEELS; STEELS; 360103* - Metals & Alloys- Mechanical Properties; 360102 - Metals & Alloys- Structure & Phase Studies

Citation Formats

Turner, A.P.L. Cyclic deformation behavior of Type 304 stainless steel at elevated temperature. United States: N. p., 1979. Web. doi:10.1007/BF02817632.
Turner, A.P.L. Cyclic deformation behavior of Type 304 stainless steel at elevated temperature. United States. doi:10.1007/BF02817632.
Turner, A.P.L. Thu . "Cyclic deformation behavior of Type 304 stainless steel at elevated temperature". United States. doi:10.1007/BF02817632.
@article{osti_6171641,
title = {Cyclic deformation behavior of Type 304 stainless steel at elevated temperature},
author = {Turner, A.P.L.},
abstractNote = {Samples of 304 stainless steel were subjected to a variety of deformation histories at 300 and 560/sup 0/C. The deformation histories included both periods of constant stress amplitude cyclic loading and constant strain rate tensile deformation. It was found that changes in the plastic strain amplitude during cycling were not always correlated with changes in the tensile flow stress. This indicates that a mechanical equation of state based on the flow stress as the only state variable cannot adequately describe the mechanical behavior of 304 stainless steel at these temperatures. Transmission electron microscopy on deformed samples showed that an increase in the plastic strain amplitude during cycling at constant stress amplitude was correlated with the rearrangement of the dislocations into a tight cellular structure. This rearrangement was found to have no effect on the tensile deformation behavior of the material beyond a brief transient. It is suggested that another state variable, in addition to the flow stress, be introduced into the equation of state formulation to allow the description of the observed cyclic behavior. This additional state variable would be associated with the arrangement of the dislocations in the material.},
doi = {10.1007/BF02817632},
journal = {Metall. Trans., A; (United States)},
number = ,
volume = 10:2,
place = {United States},
year = {1979},
month = {2}
}