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 journalArticlepeer-review

7 Scopus citations

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)
Pages (from-to)S247-S253
JournalInternational Journal of Fatigue
Volume21
Issue numberSUPPL. 1
StatePublished - Sep 1999

Keywords

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

ASJC Scopus subject areas

  • Modeling and Simulation
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

Fingerprint Dive into the research topics of 'Effect of texture and ramp loading on the cyclic response and dislocation substructure of copper polycrystals'. Together they form a unique fingerprint.

Cite this