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

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consolidation
Consolidation
Extrusion
microstructure
Microstructure
Grain refinement
Coarsening
Needles
Feedstocks
Yield stress
Precipitates
Plastic deformation
Recovery
needles
plastic deformation
precipitates
recovery

Keywords

  • Aluminium alloys
  • Thermomechanical processing
  • EBSD

Cite this

Development of microstructure and properties during the multiple extrusion and consolidation of Al-4Mg-1Zr. / Garcia, Daniel Aguilar; Dye, David; Jackson, Martin; Grimes, Roger; Dashwood, Richard J.

In: Materials Science and Engineering A, Vol. 527, No. 15, 15.06.2010, p. 3358-3364.

Research output: Contribution to journalArticle

Garcia, Daniel Aguilar ; Dye, David ; Jackson, Martin ; Grimes, Roger ; Dashwood, Richard J. / Development of microstructure and properties during the multiple extrusion and consolidation of Al-4Mg-1Zr. In: Materials Science and Engineering A. 2010 ; Vol. 527, No. 15. pp. 3358-3364.
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