Hardening and microstructural reactions in high-temperature equal-channel angular pressed Mg-Nd-Gd-Zn-Zr alloy

G. Sha; J. H. Li; W. Xu; K. Xia; W. Q. Jie; S. P. Ringer

doi:10.1016/j.msea.2010.04.064

Hardening and microstructural reactions in high-temperature equal-channel angular pressed Mg-Nd-Gd-Zn-Zr alloy

G. Sha, J. H. Li, W. Xu, K. Xia, W. Q. Jie, S. P. Ringer

School of Materials Sience and Engineering

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

26 Scopus citations

Abstract

The use of high-temperature (330°C) equal-channel angular pressing (ECAP) is demonstrated to promote precipitation of a fine and uniform dispersion of the FCC β₁ phase in an Mg-Nd-Gd-Zn-Zr alloy. Significantly, this process induces a hardening reaction in the alloy, where isothermal ageing at this temperature leads only to softening. The evolution of microstructure is characterized using transmission electron microscopy and scanning electron microscopy. The nucleation and growth of precipitates during the high-temperature ECAP are discussed. This research highlights a new approach to engineer precipitate microstructures via the application of severe plastic deformation so as to extend the property space of high-temperature Mg alloys.

Original language	English
Pages (from-to)	5092-5099
Number of pages	8
Journal	Materials Science and Engineering: A
Volume	527
Issue number	20
DOIs	https://doi.org/10.1016/j.msea.2010.04.064
State	Published - Jul 2010

Keywords

Equal-channel angular pressing
Mg alloy
Nucleation and growth
Precipitation
Strengthening

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abstract = "The use of high-temperature (330°C) equal-channel angular pressing (ECAP) is demonstrated to promote precipitation of a fine and uniform dispersion of the FCC β1 phase in an Mg-Nd-Gd-Zn-Zr alloy. Significantly, this process induces a hardening reaction in the alloy, where isothermal ageing at this temperature leads only to softening. The evolution of microstructure is characterized using transmission electron microscopy and scanning electron microscopy. The nucleation and growth of precipitates during the high-temperature ECAP are discussed. This research highlights a new approach to engineer precipitate microstructures via the application of severe plastic deformation so as to extend the property space of high-temperature Mg alloys.",

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AU - Sha, G.

AU - Li, J. H.

AU - Xu, W.

AU - Xia, K.

AU - Jie, W. Q.

AU - Ringer, S. P.

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AB - The use of high-temperature (330°C) equal-channel angular pressing (ECAP) is demonstrated to promote precipitation of a fine and uniform dispersion of the FCC β1 phase in an Mg-Nd-Gd-Zn-Zr alloy. Significantly, this process induces a hardening reaction in the alloy, where isothermal ageing at this temperature leads only to softening. The evolution of microstructure is characterized using transmission electron microscopy and scanning electron microscopy. The nucleation and growth of precipitates during the high-temperature ECAP are discussed. This research highlights a new approach to engineer precipitate microstructures via the application of severe plastic deformation so as to extend the property space of high-temperature Mg alloys.

KW - Equal-channel angular pressing

KW - Mg alloy

KW - Nucleation and growth

KW - Precipitation

KW - Strengthening

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Hardening and microstructural reactions in high-temperature equal-channel angular pressed Mg-Nd-Gd-Zn-Zr alloy

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