Effect of Mg additions on the work hardening behavior of aluminum over a wide range of strain

Nguyen Q. Chinh, Judit Illy, Zsolt Kovács, Zenji Horita, Terence G. Langdon

Research output: Contribution to journalConference article

8 Citations (Scopus)

Abstract

The effect of an Mg addition on the work hardening of high purity (4N) aluminum was investigated over a wide range of strain. The analysis of the true stress-true strain (σ - ε) curves of samples after annealing and equal-channel angular pressing (ECAP) shows that the addition of 3wt% Mg strongly influences the rate of work hardening of Al. Investigations using both mechanical testing and transmission electron microscopy (TEM) reveal the decreasing effect of Mg on the recovery properties of Al from the very early stage up to at least ε = 8 of plastic deformation. It is shown that the σ - ε relationship can be accurately described by an exponential-power law constitutive relationship over a wide range of strain for pure Al but for the Al-Mg alloy this constitutive equation cannot be extended to high strains.

Original languageEnglish
Pages (from-to)1007-1012
Number of pages6
JournalMaterials Science Forum
Volume396-402
Issue number2
DOIs
Publication statusPublished - Jan 1 2002
EventAluminium Alloys 2002 Their Physical and Mechnaical Properties: Proceedings of the 8th International Conference ICAA8 - Cambridge, United Kingdom
Duration: Jul 2 2002Jul 5 2002

Keywords

  • Constitutive relationships
  • Equal-channel angular pressing (ECAP)
  • Magnesium additions
  • Microstructures
  • Stress-strain behavior
  • Work hardening

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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