Micro-engineering the stressed macro-interface and enhancing the performance of Mg/Al bimetal macrocomposites

Muralidharan Paramsothy*, Syed Fida Hassan, Narasimalu Srikanth, Manoj Gupta

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

3 Scopus citations


New bimetal magnesium/aluminium macrocomposites containing millimeter-scale Al based core reinforcement were fabricated using solidification processing followed by hot coextrusion. The initial macrocomposite consisted of a combination of pure Mg shell and pure Al core. Some problems encountered with the macrocomposite were Mg and Al grain coarsening, an inadequate Mg-Al interface (macrointerface) and consequent reduction in strength, compared to monolithic Mg. To rectify these problems, three approaches were taken in the following order primarily to widen (strengthen) the Mg-Al interface: (a) pouring of pure Al at 900°C (higher temperature approach), (b) pure Mg shell substitution with AZ31 shell (single substitution approach) and (c) pure Mg shell and pure Al core substitution with AZ31 shell and AA5052 core, respectively (double substitution approach). The evolution (strengthening) of the Mg-Al interface and its effect on microstructure and mechanical properties in each macrocomposite is investigated in this paper.

Original languageEnglish
Title of host publication4th International Conference Organised by the CAST CRC, on Behalf of the Global Light Metals Alliance
PublisherTrans Tech Publications Ltd
Number of pages5
ISBN (Print)0878493271, 9780878493272
StatePublished - 2009

Publication series

NameMaterials Science Forum
Volume618 619
ISSN (Print)0255-5476
ISSN (Electronic)1662-9752


  • AZ31 - AA5052
  • Aluminium
  • Interface
  • Macrocomposite
  • Magnesium

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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