Plastic instabilities and dislocation densities during plastic deformation in Al-Mg alloys

Gyozo Horváth, N. Chinh, J. Gubicza, J. Lendvai

Research output: Contribution to journalArticle

46 Citations (Scopus)

Abstract

Plastic deformation of Al-Mg alloys were investigated by analyzing the stress-strain curves obtained in uniaxial compression tests at constant loading rate. Experimental results have shown the well-known phenomenon of plastic instabilities - the Portevin-Le Chatelier effect - in these solid solution alloys. Using the characteristics of plastic instabilities - the local stress increment, Δσ, - dislocation densities were calculated and compared with those determined by considering the global strain hardening. The influence of the increasing Mg concentration on the multiplication and the annihilation of dislocations, as well as on the development of the mobile and immobile dislocation densities was also analyzed.

Original languageEnglish
Pages (from-to)186-192
Number of pages7
JournalMaterials Science and Engineering A
Volume445-446
DOIs
Publication statusPublished - Feb 15 2007

Fingerprint

plastic deformation
Plastic deformation
plastics
Plastics
Stress-strain curves
Portevin-le Chatelier effect
Strain hardening
Solid solutions
loading rate
compression tests
strain hardening
multiplication
solid solutions
curves

Keywords

  • Al-Mg alloys
  • Dislocation densities
  • Plastic instabilities

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Plastic instabilities and dislocation densities during plastic deformation in Al-Mg alloys. / Horváth, Gyozo; Chinh, N.; Gubicza, J.; Lendvai, J.

In: Materials Science and Engineering A, Vol. 445-446, 15.02.2007, p. 186-192.

Research output: Contribution to journalArticle

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