Microstructure and mechanical properties of extruded Mg-1Ca-1Zn-0.6Zr alloy

J. Geng; J. F. Nie

doi:10.1016/j.msea.2015.12.004

Microstructure and mechanical properties of extruded Mg-1Ca-1Zn-0.6Zr alloy

J. Geng, J. F. Nie

Materials Science & Engineering

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

18 Citations (Scopus)

Abstract

The microstructure and tensile property of extruded Mg-1Ca-1Zn-0.6Zr alloy have been examined by means of electron backscattered diffraction, scanning and transmission electron microscopy. A fine microstructure and a typical basal texture are obtained in the extruded alloy which exhibits a yield strength as high as 306MPa along with a moderate elongation ~11%. The refined as-extruded microstructure is a result of the combination of dynamic recrystallisation and the Zener pinning effect induced by the fine precipitates. Both discontinuous and continuous dynamic recrystallisation are found to be operative in this study. Under tensile stress, cracks nucleate and propagate in the large Mg₂Ca(Zn) particles which are formed during the solidification of casting and retained after extrusion.

Original language	English
Pages (from-to)	27-34
Number of pages	8
Journal	Materials Science and Engineering A: Structural Materials: Properties, Microstructure and Processing
Volume	653
DOIs	https://doi.org/10.1016/j.msea.2015.12.004
Publication status	Published - 20 Jan 2016

Keywords

Dynamic recrystallisation
Extrusion
Magnesium alloys
Microstructure
Precipitates

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10.1016/j.msea.2015.12.004Licence: Unspecified

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Cite this

Geng, J., & Nie, J. F. (2016). Microstructure and mechanical properties of extruded Mg-1Ca-1Zn-0.6Zr alloy. Materials Science and Engineering A: Structural Materials: Properties, Microstructure and Processing, 653, 27-34. https://doi.org/10.1016/j.msea.2015.12.004

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abstract = "The microstructure and tensile property of extruded Mg-1Ca-1Zn-0.6Zr alloy have been examined by means of electron backscattered diffraction, scanning and transmission electron microscopy. A fine microstructure and a typical basal texture are obtained in the extruded alloy which exhibits a yield strength as high as 306MPa along with a moderate elongation ~11%. The refined as-extruded microstructure is a result of the combination of dynamic recrystallisation and the Zener pinning effect induced by the fine precipitates. Both discontinuous and continuous dynamic recrystallisation are found to be operative in this study. Under tensile stress, cracks nucleate and propagate in the large Mg2Ca(Zn) particles which are formed during the solidification of casting and retained after extrusion.",

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AB - The microstructure and tensile property of extruded Mg-1Ca-1Zn-0.6Zr alloy have been examined by means of electron backscattered diffraction, scanning and transmission electron microscopy. A fine microstructure and a typical basal texture are obtained in the extruded alloy which exhibits a yield strength as high as 306MPa along with a moderate elongation ~11%. The refined as-extruded microstructure is a result of the combination of dynamic recrystallisation and the Zener pinning effect induced by the fine precipitates. Both discontinuous and continuous dynamic recrystallisation are found to be operative in this study. Under tensile stress, cracks nucleate and propagate in the large Mg2Ca(Zn) particles which are formed during the solidification of casting and retained after extrusion.

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