Microstructural evolution in a commercial Al-Mg-Sc alloy during ECAP at 300°C

O. Sitdikov, T. Sakai, E. Avtokratova, R. Kaibyshev, K. Tsuzaki, Y. Watanabe

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

3 Citations (Scopus)

Abstract

Microstructural evolution taking place during equal channel angular pressing (ECAP) was studied in a commercial coarse-grained Al-6%Mg-0.4%Mn-0.3%Sc alloy at a temperature of 300°C (∼0.6Tm). Samples were pressed using route A to a total strain of 12 and quenched in water after each ECAP pass. ECAP at moderate-to-high strains leads to the formation of a bimodal grain structure with grain sizes of around 1 and 8 μm and volume fractions of 0.3 and 0.6, respectively. The development of new-grained regions has been shown to result from a concurrent operation of continuous dynamic recrystallization that occurs during deformation and static recrystallization that occurs during each ECAP cycle by the exposure of the as-deformed material in the die kept at 300°C for around 1.5 minutes. The microstructural development during warm-to-hot ECAP is discussed in terms of the enhanced driving force for recrystallization, resulting from the evolution of high-density dislocation substructures due to the localization of plastic flow and inhibition of recovery in the present alloy.

Original languageEnglish
Title of host publicationRecrystallization and Grain Growth III - Proceedings of the Third International Conference on Recrystallization and Grain Growth, ReX and GG III
Pages569-574
Number of pages6
EditionPART 1
Publication statusPublished - Dec 1 2007
Externally publishedYes
Event3rd International Conference on Recrystallization and Grain Growth, ReX GG III - Jeju Island, Korea, Republic of
Duration: Jun 10 2007Jun 15 2007

Publication series

NameMaterials Science Forum
NumberPART 1
Volume558-559
ISSN (Print)0255-5476

Other

Other3rd International Conference on Recrystallization and Grain Growth, ReX GG III
CountryKorea, Republic of
CityJeju Island
Period6/10/076/15/07

All Science Journal Classification (ASJC) codes

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

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    Sitdikov, O., Sakai, T., Avtokratova, E., Kaibyshev, R., Tsuzaki, K., & Watanabe, Y. (2007). Microstructural evolution in a commercial Al-Mg-Sc alloy during ECAP at 300°C. In Recrystallization and Grain Growth III - Proceedings of the Third International Conference on Recrystallization and Grain Growth, ReX and GG III (PART 1 ed., pp. 569-574). (Materials Science Forum; Vol. 558-559, No. PART 1).