Compressive behaviour of nanocrystalline Mg-5Al alloys

H. Diao, C. Yan*, J. M. Bell, L. Lu, G. P. Zhang, S. Kabra, K. D. Liss, M. W. Chen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

Magnesium alloys are attracting increasing research interests due to their low density, high specific strength, good machinability and availability as compared to other structural materials. However, the deformation and failure mechanisms of nanocrystalline (nc) Mg alloys have not been well understood. In this work, the deformation behaviour of nc Mg-5Al alloys was investigated using compression test, with focus on the effects of grain size. The average grain size of the Mg- Al alloy was changed from 13 to 50 nm via mechanical milling. The results showed that grain size had a significant influence on the yield stress and ductility of the Mg alloys, and the materials exhibited increased strain rate sensitivity with a decrease in grain size. The deformation mechanisms were also strongly dependent on the grain sizes.

Original languageEnglish
Pages (from-to)85-87
Number of pages3
JournalMaterials Technology
Volume27
Issue number1
DOIs
StatePublished - Feb 2012
Externally publishedYes

Keywords

  • Deformation mechanism
  • Nanocrystalline Mg alloy
  • Strain hardening
  • Strain rate sensitivity
  • Texture

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