Effect of ageing treatment on the precipitation behaviour of Mg-Gd-Y-Zn-Zr alloy

C. Xu; M. Y. Zheng; K. Wu; E. D. Wang; G. H. Fan; S. W. Xu; S. Kamado; X. D. Liu; G. J. Wang; X. Y. Lv

doi:10.1016/j.jallcom.2012.09.101

Effect of ageing treatment on the precipitation behaviour of Mg-Gd-Y-Zn-Zr alloy

C. Xu
, M. Y. Zheng^*
, K. Wu
, E. D. Wang
, G. H. Fan
, S. W. Xu
, S. Kamado
, X. D. Liu
, G. J. Wang
, X. Y. Lv

^*Corresponding author for this work

Harbin Institute of Technology
Nagaoka University of Technology
Northeast Light Alloy Company Limited

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

100 Scopus citations

Abstract

Ageing treatment at 200 °C and 225 °C for various periods of time was introduced to the Mg-8.2Gd-3.8Y-1.0Zn-0.4Zr (wt.%) alloy, the age-hardening behaviour and phase transformation were analysed systematically. The alloy aged at 225 °C exhibits accelerated ageing progress compared with that aged at 200 °C. The precipitation sequences of the alloy aged at both 200 °C and 225 °C are supersaturated solid solution (SSSS) → β″ (D0₁₉) → β′ (bco). Stacking faults and 14H LPSO phase formed in the alloy over-aged at 200 °C and 225 °C, respectively. The equilibrium β phase precipitated at the grain boundaries with the formation of precipitate free zone (PFZ) at the peak-aged stage, after further ageing treatment, the β phase got coarsened, which was accompanied with the widening of the PFZ.

Original language	English
Pages (from-to)	50-56
Number of pages	7
Journal	Journal of Alloys and Compounds
Volume	550
DOIs	https://doi.org/10.1016/j.jallcom.2012.09.101
State	Published - 15 Feb 2013
Externally published	Yes

Keywords

Age hardening
Mg-Gd-Y-Zn-Zr alloy
Microstructure
Precipitation

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10.1016/j.jallcom.2012.09.101

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title = "Effect of ageing treatment on the precipitation behaviour of Mg-Gd-Y-Zn-Zr alloy",

abstract = "Ageing treatment at 200 °C and 225 °C for various periods of time was introduced to the Mg-8.2Gd-3.8Y-1.0Zn-0.4Zr (wt.\%) alloy, the age-hardening behaviour and phase transformation were analysed systematically. The alloy aged at 225 °C exhibits accelerated ageing progress compared with that aged at 200 °C. The precipitation sequences of the alloy aged at both 200 °C and 225 °C are supersaturated solid solution (SSSS) → β″ (D019) → β′ (bco). Stacking faults and 14H LPSO phase formed in the alloy over-aged at 200 °C and 225 °C, respectively. The equilibrium β phase precipitated at the grain boundaries with the formation of precipitate free zone (PFZ) at the peak-aged stage, after further ageing treatment, the β phase got coarsened, which was accompanied with the widening of the PFZ.",

keywords = "Age hardening, Mg-Gd-Y-Zn-Zr alloy, Microstructure, Precipitation",

author = "C. Xu and Zheng, \{M. Y.\} and K. Wu and Wang, \{E. D.\} and Fan, \{G. H.\} and Xu, \{S. W.\} and S. Kamado and Liu, \{X. D.\} and Wang, \{G. J.\} and Lv, \{X. Y.\}",

year = "2013",

month = feb,

day = "15",

doi = "10.1016/j.jallcom.2012.09.101",

language = "英语",

volume = "550",

pages = "50--56",

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TY - JOUR

T1 - Effect of ageing treatment on the precipitation behaviour of Mg-Gd-Y-Zn-Zr alloy

AU - Xu, C.

AU - Zheng, M. Y.

AU - Wu, K.

AU - Wang, E. D.

AU - Fan, G. H.

AU - Xu, S. W.

AU - Kamado, S.

AU - Liu, X. D.

AU - Wang, G. J.

AU - Lv, X. Y.

PY - 2013/2/15

Y1 - 2013/2/15

N2 - Ageing treatment at 200 °C and 225 °C for various periods of time was introduced to the Mg-8.2Gd-3.8Y-1.0Zn-0.4Zr (wt.%) alloy, the age-hardening behaviour and phase transformation were analysed systematically. The alloy aged at 225 °C exhibits accelerated ageing progress compared with that aged at 200 °C. The precipitation sequences of the alloy aged at both 200 °C and 225 °C are supersaturated solid solution (SSSS) → β″ (D019) → β′ (bco). Stacking faults and 14H LPSO phase formed in the alloy over-aged at 200 °C and 225 °C, respectively. The equilibrium β phase precipitated at the grain boundaries with the formation of precipitate free zone (PFZ) at the peak-aged stage, after further ageing treatment, the β phase got coarsened, which was accompanied with the widening of the PFZ.

AB - Ageing treatment at 200 °C and 225 °C for various periods of time was introduced to the Mg-8.2Gd-3.8Y-1.0Zn-0.4Zr (wt.%) alloy, the age-hardening behaviour and phase transformation were analysed systematically. The alloy aged at 225 °C exhibits accelerated ageing progress compared with that aged at 200 °C. The precipitation sequences of the alloy aged at both 200 °C and 225 °C are supersaturated solid solution (SSSS) → β″ (D019) → β′ (bco). Stacking faults and 14H LPSO phase formed in the alloy over-aged at 200 °C and 225 °C, respectively. The equilibrium β phase precipitated at the grain boundaries with the formation of precipitate free zone (PFZ) at the peak-aged stage, after further ageing treatment, the β phase got coarsened, which was accompanied with the widening of the PFZ.

KW - Age hardening

KW - Mg-Gd-Y-Zn-Zr alloy

KW - Microstructure

KW - Precipitation

UR - https://www.scopus.com/pages/publications/84868674686

U2 - 10.1016/j.jallcom.2012.09.101

DO - 10.1016/j.jallcom.2012.09.101

M3 - 文章

AN - SCOPUS:84868674686

SN - 0925-8388

VL - 550

SP - 50

EP - 56

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

ER -

Effect of ageing treatment on the precipitation behaviour of Mg-Gd-Y-Zn-Zr alloy

Abstract

Keywords

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