Inhomogeneous evolution of microstructure in AZ91 Mg-alloy during high temperature equal-channel angular pressing

Jeno Gubicza, Krisztián Máthis, Zoltán Hegedus, Gábor Ribárik, Attila L. Tóth

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

The evolution of the microstructure in AZ91 Mg-alloy processed by equal-channel angular pressing (ECAP) at 543 K was investigated. The initial material was a supersaturated solid solution, therefore the severe plastic deformation and the precipitation occurred simultaneously. The precipitate morphology and the defect structure in the matrix were studied after 2 and 8 ECAP passes. As a result of ECAP, continuous precipitates formed instead of discontinuous ones usually observed at 543 K. After 2 passes of ECAP, both the size of precipitates and the solute atom concentration in the matrix showed a high level of inhomogeneity but after 8 passes the microstructure became more homogeneous. The precipitates coarsened with increasing the number of ECAP passes.

Original languageEnglish
Pages (from-to)166-172
Number of pages7
JournalJournal of Alloys and Compounds
Volume492
Issue number1-2
DOIs
Publication statusPublished - Mar 4 2010

Keywords

  • Dislocations
  • Equal-channel angular pressing
  • Mg-alloys
  • Precipitation
  • Severe plastic deformation

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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