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

研究成果: 書籍/レポート タイプへの寄稿会議への寄与

4 被引用数 (Scopus)

抄録

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.

本文言語英語
ホスト出版物のタイトルRecrystallization and Grain Growth III - Proceedings of the Third International Conference on Recrystallization and Grain Growth, ReX and GG III
ページ569-574
ページ数6
PART 1
出版ステータス出版済み - 12月 1 2007
外部発表はい
イベント3rd International Conference on Recrystallization and Grain Growth, ReX GG III - Jeju Island, 韓国
継続期間: 6月 10 20076月 15 2007

出版物シリーズ

名前Materials Science Forum
番号PART 1
558-559
ISSN(印刷版)0255-5476

その他

その他3rd International Conference on Recrystallization and Grain Growth, ReX GG III
国/地域韓国
CityJeju Island
Period6/10/076/15/07

!!!All Science Journal Classification (ASJC) codes

  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学

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