A new metastable precipitate phase in Mg-Gd-Y-Zr alloy

H. Zhou; W.Z. Xu; W.W. Jian; G.M. Cheng; X.L. Ma; W. Guo; S.N. Mathaudhu; Q.D. Wang; Y.T. Zhu

doi:10.1080/14786435.2014.913115

A new metastable precipitate phase in Mg-Gd-Y-Zr alloy

H. Zhou, W.Z. Xu, W.W. Jian, G.M. Cheng, X.L. Ma, W. Guo, S.N. Mathaudhu, Q.D. Wang^*, Y.T. Zhu^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

51 Citations (Scopus)

Abstract

Mg-RE alloys are among the strongest Mg-based alloys due to their unique precipitation structures. A previously unobserved metastable phase (β_T) is found to coexist with reported β″ and β′ metastable phases under peak ageing conditions in a Mg-Gd-Y-Zr alloy. The position of the RE elements within the β_T phase is identified using atomic-resolution high-angle annular dark field scanning transmission electron microscopy imaging, and the β_T phase is shown to have an orthorhombic structure with a stoichiometry of Mg₅RE. Based on these observations, a new precipitation sequence is proposed. © 2014 Taylor & Francis.

Original language	English
Pages (from-to)	2403-2409
Journal	Philosophical Magazine
Volume	94
Issue number	21
Online published	13 May 2014
DOIs	https://doi.org/10.1080/14786435.2014.913115
Publication status	Published - 2014
Externally published	Yes

Research Keywords

base-centred orthorhombic structure
magnesium alloys
metastable phases
phase transformations

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10.1080/14786435.2014.913115

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@article{b7a74b2555b246be8d4c49b5cab9ee28,

title = "A new metastable precipitate phase in Mg-Gd-Y-Zr alloy",

abstract = "Mg-RE alloys are among the strongest Mg-based alloys due to their unique precipitation structures. A previously unobserved metastable phase (βT) is found to coexist with reported β″ and β′ metastable phases under peak ageing conditions in a Mg-Gd-Y-Zr alloy. The position of the RE elements within the βT phase is identified using atomic-resolution high-angle annular dark field scanning transmission electron microscopy imaging, and the βT phase is shown to have an orthorhombic structure with a stoichiometry of Mg5RE. Based on these observations, a new precipitation sequence is proposed. {\textcopyright} 2014 Taylor & Francis.",

keywords = "base-centred orthorhombic structure, magnesium alloys, metastable phases, phase transformations, base-centred orthorhombic structure, magnesium alloys, metastable phases, phase transformations, base-centred orthorhombic structure, magnesium alloys, metastable phases, phase transformations",

author = "H. Zhou and W.Z. Xu and W.W. Jian and G.M. Cheng and X.L. Ma and W. Guo and S.N. Mathaudhu and Q.D. Wang and Y.T. Zhu",

year = "2014",

doi = "10.1080/14786435.2014.913115",

language = "English",

volume = "94",

pages = "2403--2409",

journal = "Philosophical Magazine",

issn = "1478-6435",

publisher = "Taylor & Francis",

number = "21",

}

TY - JOUR

T1 - A new metastable precipitate phase in Mg-Gd-Y-Zr alloy

AU - Zhou, H.

AU - Xu, W.Z.

AU - Jian, W.W.

AU - Cheng, G.M.

AU - Ma, X.L.

AU - Guo, W.

AU - Mathaudhu, S.N.

AU - Wang, Q.D.

AU - Zhu, Y.T.

PY - 2014

Y1 - 2014

N2 - Mg-RE alloys are among the strongest Mg-based alloys due to their unique precipitation structures. A previously unobserved metastable phase (βT) is found to coexist with reported β″ and β′ metastable phases under peak ageing conditions in a Mg-Gd-Y-Zr alloy. The position of the RE elements within the βT phase is identified using atomic-resolution high-angle annular dark field scanning transmission electron microscopy imaging, and the βT phase is shown to have an orthorhombic structure with a stoichiometry of Mg5RE. Based on these observations, a new precipitation sequence is proposed. © 2014 Taylor & Francis.

AB - Mg-RE alloys are among the strongest Mg-based alloys due to their unique precipitation structures. A previously unobserved metastable phase (βT) is found to coexist with reported β″ and β′ metastable phases under peak ageing conditions in a Mg-Gd-Y-Zr alloy. The position of the RE elements within the βT phase is identified using atomic-resolution high-angle annular dark field scanning transmission electron microscopy imaging, and the βT phase is shown to have an orthorhombic structure with a stoichiometry of Mg5RE. Based on these observations, a new precipitation sequence is proposed. © 2014 Taylor & Francis.

KW - base-centred orthorhombic structure

KW - magnesium alloys

KW - metastable phases

KW - phase transformations

KW - base-centred orthorhombic structure

KW - magnesium alloys

KW - metastable phases

KW - phase transformations

KW - base-centred orthorhombic structure

KW - magnesium alloys

KW - metastable phases

KW - phase transformations

UR - http://www.scopus.com/inward/record.url?scp=84903315878&partnerID=8YFLogxK

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-84903315878&origin=recordpage

U2 - 10.1080/14786435.2014.913115

DO - 10.1080/14786435.2014.913115

M3 - RGC 21 - Publication in refereed journal

SN - 1478-6435

VL - 94

SP - 2403

EP - 2409

JO - Philosophical Magazine

JF - Philosophical Magazine

IS - 21

ER -

A new metastable precipitate phase in Mg-Gd-Y-Zr alloy

Abstract

Research Keywords

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