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

材料学院

科研成果: 期刊稿件 › 文章 › 同行评审

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摘要

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.

源语言	英语
页（从-至）	5092-5099
页数	8
期刊	Materials Science and Engineering: A
卷	527
期	20
DOI	https://doi.org/10.1016/j.msea.2010.04.064
出版状态	已出版 - 7月 2010

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

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.",

keywords = "Equal-channel angular pressing, Mg alloy, Nucleation and growth, Precipitation, Strengthening",

author = "G. Sha and Li, {J. H.} and W. Xu and K. Xia and Jie, {W. Q.} and Ringer, {S. P.}",

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T1 - Hardening and microstructural reactions in high-temperature equal-channel angular pressed Mg-Nd-Gd-Zn-Zr alloy

AU - Sha, G.

AU - Li, J. H.

AU - Xu, W.

AU - Xia, K.

AU - Jie, W. Q.

AU - Ringer, S. P.

PY - 2010/7

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N2 - 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.

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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DO - 10.1016/j.msea.2010.04.064

M3 - 文章

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SN - 0921-5093

VL - 527

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JO - Materials Science and Engineering: A

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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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