Diffusion in fine-grained Al alloys having low and high angle grain boundaries

Takeshi Fujita, Zenji Horita, Terence G. Langdon

Research output: Contribution to journalConference articlepeer-review

4 Citations (Scopus)

Abstract

Diffusion-couple experiments were conducted on fine-grained alloys in the Al-Mg and Al-Zn systems. It is well known that grain refinement to the submicrometer range is feasible using the process of equal-channel angular pressing (ECAP). In addition, this process can be used also to produce microstructures with predominantly low-angle or high-angle grain boundaries by controlling the shearing direction and the extent of the imposed strain. Alloys having small grain sizes but different misorientation angles were used to make diffusion couples and the interdiffusion coefficients were determined by measuring the concentration profiles across the interfaces. The contribution of grain boundary diffusion to the overall diffusion was evaluated in terms of the alloying elements and the misorientation angles.

Original languageEnglish
Pages (from-to)1061-1066
Number of pages6
JournalMaterials Science Forum
Volume396-402
Issue number2
DOIs
Publication statusPublished - 2002
EventAluminium Alloys 2002 Their Physical and Mechnaical Properties: Proceedings of the 8th International Conference ICAA8 - Cambridge, United Kingdom
Duration: 2002 Jul 22002 Jul 5

Keywords

  • Equal-channel angular pressing (ECAP).
  • Grain boundary diffusion
  • Grain boundary misorientation
  • Grain refinement
  • Interdiffusion

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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