Development of microstructure and properties during the multiple extrusion and consolidation of Al-4Mg-1Zr

Daniel Aguilar Garcia, David Dye, Martin Jackson, Roger Grimes, Richard J. Dashwood

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Multiple extrusion of Al–4Mg–1Zr (wt.%) is presented as a severe plastic deformation technique to develop an ultra-fine grained material, using rapidly solidified needles as a feedstock. After each extrusion pass the microstructure is refined, the primary Al3Zr precipitates are broken down and <50-nm-scale cubic Al3Zr are precipitated from solution. Recovery dominates the initial passes with recrystallisation becoming dominant during later passes, but the grains remain at the sub-View the MathML sourcem scale. Interestingly, the yield stress and the ultimate strength increased significantly after the first pass, and then decreased – any strength increment gained from the grain refinement was offset by coarsening of the metastable nano-scale Al3Zr dispersoids.
Original languageEnglish
Pages (from-to)3358-3364
Number of pages7
JournalMaterials Science and Engineering A
Volume527
Issue number15
Early online date18 Jan 2010
DOIs
Publication statusPublished - 15 Jun 2010

Keywords

  • Aluminium alloys
  • Thermomechanical processing
  • EBSD

Fingerprint Dive into the research topics of 'Development of microstructure and properties during the multiple extrusion and consolidation of Al-4Mg-1Zr'. Together they form a unique fingerprint.

  • Cite this