Fine-grained structure formation in Al- Mg- Sc alloy during hot ECAP

O. Sitdikov, R. Kaibyshev, E. Avtokratova, K. Tsuzaki

Research output: Chapter in Book/Report/Conference proceedingConference contribution

10 Citations (Scopus)

Abstract

Grain refinement taking place during equal channel angular pressing (ECAP) was studied in a commercial Al-6%Mg-0.4%Mn-0.3%Sc alloy at a temperature of 4500C. Inhomogeneous deformation occurring during hot ECAP of the present alloy leads to formation of deformation bands. Repeated ECAP results in mutual crossing and increase in number and misorientation of deformation bands, followed by transformation of boundaries of deformation bands into high angle boundaries. As a result, a new fine-grained microstructure with an average crystallite size of 2.8 μm develops at large strains above 8. It is concluded that grain refinement occurs in accordance with deformation-induced continuous reactions; that is essentially similar to continuous dynamic recrystallization. The mechanisms of new grain evolution, as well as factors promoting grain refinement, are discussed in detail.

Original languageEnglish
Title of host publicationNanomaterials by Severe Plastic Deformation, NanoSPD3 - Proceedings of the 3rd International Conference on Nanomaterials by Severe Plastics Deformation
Pages721-726
Number of pages6
Publication statusPublished - Dec 1 2006
Externally publishedYes
Event3rd International Conference on Nanomaterials by Severe Plastics Deformation, NanoSPD3 - Fukuoka, Japan
Duration: Sep 22 2005Sep 26 2005

Publication series

NameMaterials Science Forum
Volume503-504
ISSN (Print)0255-5476

Other

Other3rd International Conference on Nanomaterials by Severe Plastics Deformation, NanoSPD3
CountryJapan
CityFukuoka
Period9/22/059/26/05

All Science Journal Classification (ASJC) codes

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

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  • Cite this

    Sitdikov, O., Kaibyshev, R., Avtokratova, E., & Tsuzaki, K. (2006). Fine-grained structure formation in Al- Mg- Sc alloy during hot ECAP. In Nanomaterials by Severe Plastic Deformation, NanoSPD3 - Proceedings of the 3rd International Conference on Nanomaterials by Severe Plastics Deformation (pp. 721-726). (Materials Science Forum; Vol. 503-504).