Multi-phase Al-based ultrafine composite with multi-scale microstructure

J. M. Park, K. B. Kim, D. H. Kim, N. Mattern, R. Li, G. Liu, J. Eckert

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Abstract

A new class of Al-base multi-phase ultrafine composites with multi-scale microstructure, which exhibits high strength and large compressive plasticity at ambient temperature, has been developed in the Al-Cu-Si ternary system. The formation of the favorable multi-phase multi-modal structure can be achieved by proper alloy selection and by controlling the solidification process. The developed hierarchical ultrafine composites exhibit high fracture strength of ∼1 GPa and large compressive plasticity up to ∼25%. The large macroscopic plastic strain is attributed to the combination of dislocation-based slip deformation in the ductile phase and extensive shear banding in the intermetallic phase.

Original languageEnglish
Pages (from-to)1829-1833
Number of pages5
JournalIntermetallics
Volume18
Issue number10
DOIs
Publication statusPublished - 2010 Oct 1

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All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Cite this

Park, J. M., Kim, K. B., Kim, D. H., Mattern, N., Li, R., Liu, G., & Eckert, J. (2010). Multi-phase Al-based ultrafine composite with multi-scale microstructure. Intermetallics, 18(10), 1829-1833. https://doi.org/10.1016/j.intermet.2010.02.042