Journal Published Online: 01 November 1975
Volume 3, Issue 6

History Dependence in the Cyclic Stress-Strain Response of Wavy Slip Materials



A conflict exists as to whether the saturated flow stress of a wavy slip metal cycled at high plastic strain amplitudes depends on history or not. To resolve this, mechanical tests have been carried out on heavily cold-worked copper and the structures studied by transmission electron microscopy. It has been found that, for any material, there exists a prestrain (dependent on many testing and material factors) below which cyclic stress-strain response is history independent and above which it is dependent. For severe prestrains, the cycling is insufficient to balance the dislocation structures in the cell walls, and the cells are more angular and misoriented than those which occur in annealed metal subjected to strain cycling.

Author Information

Laird, C
University of Pennsylvania, Philadelphia, Pa.
Finney, JM
Aeronautical Research Laboratory, Melbourne, Australia
Schwartzman, A
Amherst College, Amherst, Mass.
de la Veaux, R
Mechanical Testing Laboratory, University of Pennsylvania, Philadelphia, Pa.
Pages: 7
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Stock #: JTE11699J
ISSN: 0090-3973
DOI: 10.1520/JTE11699J