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Title: Basis for the Bauschinger effect in copper single crystals: changes in the long-range internal stress with reverse deformation

Journal Article · · Journal of Materials Science
 [1];  [1];  [1];  [1];  [2]; ORCiD logo [3]
  1. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States)
  2. Argonne National Lab. (ANL), Argonne, IL (United States)
  3. Univ. of Southern California, Los Angeles, CA (United States)
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In this study, the long-range internal stresses (LRIS) associated with the Bauschinger effect were investigated using synchrotron X-ray microbeam diffraction and reversed deformation experiments. [100]-oriented Cu single crystals were deformed in compression to approximately -0.3 true strain, followed by tension to a strain of approximately +0.02. Two conclusions are arrived at from this work: First, the LRIS are confirmed in this work to be small relative to the applied stress both before and after reversal. Second, the LRIS persist after 2% reversed strain despite a significant drop in the overall dislocation density by dynamic recovery. This appears to satisfy the necessary condition for LRIS to significantly contribute to a Bauschinger effect in materials. Lastly, the pronounced Bauschinger effect in Cu is probably best rationalized by a combination of both the LRIS and the Orowan–Sleeswyk model that relies on a non-uniform distribution of dislocation obstacles without a substantial LRIS.

Research Organization:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC); National Science Foundation (NSF)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1560049
Journal Information:
Journal of Materials Science, Vol. 54, Issue 8; ISSN 0022-2461
Publisher:
SpringerCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 7 works
Citation information provided by
Web of Science

References (12)

Dislocation wall and cell structures and long-range internal stresses in deformed metal crystals journal September 1983
Disordered long-range internal stresses in deformed copper and the mechanisms underlying plastic deformation journal August 2011
Determination of internal stresses in cyclically deformed copper single crystals using convergent-beam electron diffraction and dislocation dipole separation measurements journal November 2000
Long-range internal stresses in monotonically and cyclically deformed metallic single crystals journal March 2009
Some trends observed in the elevated-temperature kinematic and isotropic hardening of type 304 stainless steel journal June 1985
X-ray microbeam measurements of individual dislocation cell elastic strains in deformed single-crystal copper journal July 2006
Cyclic deformation behavior and dislocation structures of [001] copper single crystals—I Cyclic stress-strain response and surface feature journal April 1997
Reversible strain in cyclic plastic deformation journal August 1978
Dislocation clustering and long-range internal stresses in monotonically and cyclically deformed metal crystals journal January 1988
Validating classical line profile analyses using microbeam diffraction from individual dislocation cell walls and cell interiors journal March 2012
A case for Taylor hardening during primary and steady-state creep in aluminium and type 304 stainless steel journal April 1990
The bauschinger effect in copper journal November 1981

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