Microstructural evolution and mechanical properties of Mg-Cu-Zn ultrafine eutectic composites

Gi A. Song, Wonhee Lee, Nae S. Lee, Ki B. Kim, Jin M. Park, Do H. Kim, Jaeseoul Lee, Jun Sik Park

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12 Citations (Scopus)


Novel ultrafine eutectic composites containing structural and spatial heterogeneities have been systematically developed in an Mg-Cu-Zn ternary system. Microstructural investigations of the ultrafine eutectic composites revealed that the bimodal eutectic structure consists of a mixture of cellular-type fine (α-Mg + MgZn2) and anomalous-type coarse (α-Mg + MgZn2 + MgCuZn) eutectic structures. An Mg 72Cu3Zn23 alloy composed of the bimodal eutectic structure without micron-scale α-Mg dendrites presents a strong improvement of yield strength up to 455 MPa with a decent plastic strain of 5%. The rotation of the bimodal eutectic colony along the interfaces is considered to be an effective way to dissipate the stress localization thus enhancing the macroscopic plasticity.

Original languageEnglish
Pages (from-to)2892-2898
Number of pages7
JournalJournal of Materials Research
Issue number9
Publication statusPublished - 2009 Sept

Bibliographical note

Funding Information:
This work was supported by the Korea Science and Engineering Foundation (KOSEF) grant funded by the Korea government (R01-2007-000-10549-0) and the Global Research Laboratory (GRL) Program of Korea Ministry of Education, Science and Technology.

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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