Influence of magnesium on grain refinement and ductility in a dilute Al-Sc alloy

M. Furukawa, A. Utsunomiya, K. Matsubara, Zenji Horita, T. G. Langdon

Research output: Contribution to journalArticle

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Abstract

Experiments were conducted to determine the influence of magnesium additions on grain refinement and tensile ductility in an Al-0.2% Sc alloy processed by equal-channel angular pressing (ECAP). The experiments show ECAP reduces the average grain size to within the range of ∼0.70 to ∼0.20 μm for alloys containing from 0 to 3% Mg but the as-pressed grain size increases to ∼0.3 μm in an alloy with 5% Mg because it is then necessary to use additional annealing treatments during the pressing process. The ultrafine grains introduced by ECAP are stable to high temperatures in the alloys containing from 0 to 3% Mg: in all alloys, the average grain size is <5 μm after annealing for 1 h at temperatures up to ∼750 K. High superplastic ductilities were achieved in the alloy containing 3% Mg but alloys containing 0.5% and 1% Mg exhibited the enhanced ductilities generally associated with conventional Al-Mg alloys. The results suggest the addition of ∼3% Mg is optimum for achieving superplastic elongations at rapid strain rates in the Al-0.2% Sc alloy.

Original languageEnglish
Pages (from-to)3829-3838
Number of pages10
JournalActa Materialia
Volume49
Issue number18
DOIs
Publication statusPublished - Oct 26 2001

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Grain refinement
Magnesium
Ductility
Equal channel angular pressing
Annealing
Strain rate
Elongation
Experiments
Temperature

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Polymers and Plastics
  • Metals and Alloys

Cite this

Furukawa, M., Utsunomiya, A., Matsubara, K., Horita, Z., & Langdon, T. G. (2001). Influence of magnesium on grain refinement and ductility in a dilute Al-Sc alloy. Acta Materialia, 49(18), 3829-3838. https://doi.org/10.1016/S1359-6454(01)00262-2

Influence of magnesium on grain refinement and ductility in a dilute Al-Sc alloy. / Furukawa, M.; Utsunomiya, A.; Matsubara, K.; Horita, Zenji; Langdon, T. G.

In: Acta Materialia, Vol. 49, No. 18, 26.10.2001, p. 3829-3838.

Research output: Contribution to journalArticle

Furukawa, M, Utsunomiya, A, Matsubara, K, Horita, Z & Langdon, TG 2001, 'Influence of magnesium on grain refinement and ductility in a dilute Al-Sc alloy', Acta Materialia, vol. 49, no. 18, pp. 3829-3838. https://doi.org/10.1016/S1359-6454(01)00262-2
Furukawa M, Utsunomiya A, Matsubara K, Horita Z, Langdon TG. Influence of magnesium on grain refinement and ductility in a dilute Al-Sc alloy. Acta Materialia. 2001 Oct 26;49(18):3829-3838. https://doi.org/10.1016/S1359-6454(01)00262-2
Furukawa, M. ; Utsunomiya, A. ; Matsubara, K. ; Horita, Zenji ; Langdon, T. G. / Influence of magnesium on grain refinement and ductility in a dilute Al-Sc alloy. In: Acta Materialia. 2001 ; Vol. 49, No. 18. pp. 3829-3838.
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