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

doi:10.1557/jmr.2009.0330

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

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

12 Citations (Scopus)

Abstract

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 language	English
Pages (from-to)	2892-2898
Number of pages	7
Journal	Journal of Materials Research
Volume	24
Issue number	9
DOIs	https://doi.org/10.1557/jmr.2009.0330
Publication status	Published - 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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title = "Microstructural evolution and mechanical properties of Mg-Cu-Zn ultrafine eutectic composites",

abstract = "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.",

author = "Song, {Gi A.} and Wonhee Lee and Lee, {Nae S.} and Kim, {Ki B.} and Park, {Jin M.} and Kim, {Do H.} and Jaeseoul Lee and Park, {Jun Sik}",

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.",

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AU - Lee, Wonhee

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AU - Kim, Ki B.

AU - Park, Jin M.

AU - Kim, Do H.

AU - Lee, Jaeseoul

AU - Park, Jun Sik

N1 - 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.

PY - 2009/9

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N2 - 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.

AB - 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.

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

Abstract

Bibliographical note

All Science Journal Classification (ASJC) codes

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