Effect of texture and ramp loading on the cyclic response and dislocation substructure of copper polycrystals

Pedro Peralta, K. Obergfell, L. Lianes, C. Laird, T. E. Mitchell

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Fatigue tests were carried out on copper polycrystals that had a texture with strong components along directions inside the standard stereographic triangle (single slip orientations in monocrystals). The experiments showed that this "single slip" texture, ramp loading as a mechanical pretreatment and extended cycling at a given stress to insure saturation provide the conditions to obtain a plateau in the Cyclic Stress-Strain Curve (CSSC) of copper polycrystals in a reproducible fashion. Transmission Electron Microscopy (TEM) studies revealed the presence of numerous Persistent Slip Bands (PSB's) in samples deformed within the plateau regime.

Original languageEnglish (US)
JournalInternational Journal of Fatigue
Volume21
Issue numberSUPPL. 1
StatePublished - Sep 1999

Fingerprint

Polycrystal
Polycrystals
Substructure
Dislocation
Dislocations (crystals)
Copper
Slip
Texture
Textures
Stress-strain curves
Cycling
Fatigue of materials
Transmission Electron Microscopy
Transmission electron microscopy
Fatigue
Saturation
Triangle
Curve
Experiments
Experiment

Keywords

  • Cyclic stress-strain curve
  • Dislocation structures
  • Plateau
  • Polycrystals
  • Strain localization

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials

Cite this

Effect of texture and ramp loading on the cyclic response and dislocation substructure of copper polycrystals. / Peralta, Pedro; Obergfell, K.; Lianes, L.; Laird, C.; Mitchell, T. E.

In: International Journal of Fatigue, Vol. 21, No. SUPPL. 1, 09.1999.

Research output: Contribution to journalArticle

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AU - Mitchell, T. E.

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