Bulk ultrafine and nanostructured materials from consolidation of particles by back pressure equal channel angular pressing

K. Xia*, W. Xu, X. Wu, S. Goussous

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review

2 Citations (Scopus)

Abstract

Severe plastic deformation (SPD) has received considerable attention for its capability to produce ultrafine and nano structured materials. On the one hand, SPD, especially in the forms of equal channel angular pressing (ECAP) and high pressure torsion (HPT) is able to refine bulk materials with coarse grain structures. On the other hand, SPD has been used to synthesise bulk materials from particles. It enables particles from nano to micro scales to be consolidated into fully dense materials at much lower temperatures and shorter times, compared to the conventional sintering processing. It is particularly relevant to consolidating particles with non-equilibrium micro structures and to producing complex multiphase alloys. In this summary, ECAP as an effective process to synthesise a range of light metal based materials from particles with various sizes and structures, including aluminium and aluminium composites, titanium and magnesium, will be demonstrated. Full density and good bonding are achieved easily with the application of a back pressure. Microstructures from nano to ultrafine scales have been produced, resulting in significantly enhanced strength. Simultaneous increase in ductility has also been achieved in some alloys by virtue of multi-scale structures.

Original languageEnglish
Title of host publicationMaterials Science Forum - Nanomaterials by Severe Plastic Deformation 4 - 4th International Conference on Nanomaterials by Severe Plastic Deformation
EditorsYuri Estrin, Hans Jürgen Maier
Place of PublicationDurnten-Zurich, Switzerland
PublisherTrans Tech Publications
Pages119-126
Number of pages8
ISBN (Print)9770255547605, 9780878493753
Publication statusPublished - 2008
Externally publishedYes
Event4th International Conference on Nanomaterials by Severe Plastic Deformation - Goslar, Germany
Duration: 18 Aug 200822 Aug 2008

Publication series

NameMaterials Science Forum
PublisherTrans Tech Publications
Volume584-586
ISSN (Print)0255-5476

Other

Other4th International Conference on Nanomaterials by Severe Plastic Deformation
CountryGermany
CityGoslar
Period18/08/0822/08/08

Keywords

  • Aluminium
  • Back pressure
  • Composites
  • Equal channel angular pressing
  • Magnesium
  • Nanostructured
  • Particles
  • Powder consolidation
  • Severe plastic deformation
  • Titanium

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