Characterization of stress-strain relationships in Al over a wide range of testing temperatures

Tamás Csanádi, Nguyen Q. Chinh, Jeno Gubicza, György Vörös, Terence G. Langdon

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The stress-strain relationships characterizing plastic deformation of aluminum are described over a wide range of testing temperatures by applying both a widely used phenomenological relationship and a well-known dislocation-based model. It is shown that over the whole range of testing temperatures the trapping of mobile dislocations and the annihilation of forest dislocations are controlled by the same thermally-activated dislocation motion, thereby leading to a simplified model which uses only two parameters to describe the multiplication and the annihilation rates of dislocations. The temperature dependence of these two microscopic quantities is explained. Furthermore, correlations between the characteristics of macroscopic and microscopic descriptions were established over a wide range of testing temperatures for pure Al.

Original languageEnglish
Pages (from-to)178-192
Number of pages15
JournalInternational Journal of Plasticity
Volume54
DOIs
Publication statusPublished - Mar 1 2014

Keywords

  • A. Dislocations
  • A. Microstructures
  • A. Strengthening mechanisms
  • B. Constitutive behavior
  • B. Stress-strain relationship

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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