Effect of quasicrystal and Laves phases on strength and ductility of as-extruded and heat treated Mg-Zn-Gd-based alloys

Guangyin Yuan; Yong Liu; Chen Lu; Wenjiang Ding

doi:10.1016/j.msea.2007.03.016

Effect of quasicrystal and Laves phases on strength and ductility of as-extruded and heat treated Mg-Zn-Gd-based alloys

Guangyin Yuan, Yong Liu, Chen Lu, Wenjiang Ding

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

43 Citations (Scopus)

Abstract

Microstructure and mechanical properties of Mg_95.9Zn_3.5Gd_0.6 and Mg_94.4Zn_3.5Gd_0.6Cu_1.5 alloys reinforced by icosahedral quasicrystalline phase (I-phase) and Laves phase have been studied after extrusion at 573 K and 673 K. Extrusion significantly refined the I-phase and Laves phase, and made them exist as particles along the grain boundary and in the matrix. The strengthening effect of I-phase and Laves phase has been analyzed. The combination of I-phase and Laves phase has higher contribution to the improvement of yield strength, which made the Mg_94.4Zn_3.5Gd_0.6Cu_1.5 alloy exhibits strong heat resistance. The results show that the two alloys have different heat treatment effect due to different fraction of I-phase and Laves phase. The Mg_94.4Zn_3.5Gd_0.6 alloy after extrusion at 673 K has higher elongation about 94% at 473 K due to higher fraction of I-phase. © 2007 Elsevier B.V. All rights reserved.

Original language	English
Pages (from-to)	75-82
Journal	Materials Science and Engineering A
Volume	472
Issue number	1-2
DOIs	https://doi.org/10.1016/j.msea.2007.03.016
Publication status	Published - 15 Jan 2008
Externally published	Yes

Research Keywords

Extrusion
Icosahedral
Laves phase
Mg-Zn-Gd
Quasicrystal

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title = "Effect of quasicrystal and Laves phases on strength and ductility of as-extruded and heat treated Mg-Zn-Gd-based alloys",

abstract = "Microstructure and mechanical properties of Mg95.9Zn3.5Gd0.6 and Mg94.4Zn3.5Gd0.6Cu1.5 alloys reinforced by icosahedral quasicrystalline phase (I-phase) and Laves phase have been studied after extrusion at 573 K and 673 K. Extrusion significantly refined the I-phase and Laves phase, and made them exist as particles along the grain boundary and in the matrix. The strengthening effect of I-phase and Laves phase has been analyzed. The combination of I-phase and Laves phase has higher contribution to the improvement of yield strength, which made the Mg94.4Zn3.5Gd0.6Cu1.5 alloy exhibits strong heat resistance. The results show that the two alloys have different heat treatment effect due to different fraction of I-phase and Laves phase. The Mg94.4Zn3.5Gd0.6 alloy after extrusion at 673 K has higher elongation about 94% at 473 K due to higher fraction of I-phase. {\textcopyright} 2007 Elsevier B.V. All rights reserved.",

keywords = "Extrusion, Icosahedral, Laves phase, Mg-Zn-Gd, Quasicrystal",

author = "Guangyin Yuan and Yong Liu and Chen Lu and Wenjiang Ding",

year = "2008",

month = jan,

day = "15",

doi = "10.1016/j.msea.2007.03.016",

language = "English",

volume = "472",

pages = "75--82",

journal = "Materials Science and Engineering A",

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TY - JOUR

T1 - Effect of quasicrystal and Laves phases on strength and ductility of as-extruded and heat treated Mg-Zn-Gd-based alloys

AU - Yuan, Guangyin

AU - Liu, Yong

AU - Lu, Chen

AU - Ding, Wenjiang

PY - 2008/1/15

Y1 - 2008/1/15

N2 - Microstructure and mechanical properties of Mg95.9Zn3.5Gd0.6 and Mg94.4Zn3.5Gd0.6Cu1.5 alloys reinforced by icosahedral quasicrystalline phase (I-phase) and Laves phase have been studied after extrusion at 573 K and 673 K. Extrusion significantly refined the I-phase and Laves phase, and made them exist as particles along the grain boundary and in the matrix. The strengthening effect of I-phase and Laves phase has been analyzed. The combination of I-phase and Laves phase has higher contribution to the improvement of yield strength, which made the Mg94.4Zn3.5Gd0.6Cu1.5 alloy exhibits strong heat resistance. The results show that the two alloys have different heat treatment effect due to different fraction of I-phase and Laves phase. The Mg94.4Zn3.5Gd0.6 alloy after extrusion at 673 K has higher elongation about 94% at 473 K due to higher fraction of I-phase. © 2007 Elsevier B.V. All rights reserved.

AB - Microstructure and mechanical properties of Mg95.9Zn3.5Gd0.6 and Mg94.4Zn3.5Gd0.6Cu1.5 alloys reinforced by icosahedral quasicrystalline phase (I-phase) and Laves phase have been studied after extrusion at 573 K and 673 K. Extrusion significantly refined the I-phase and Laves phase, and made them exist as particles along the grain boundary and in the matrix. The strengthening effect of I-phase and Laves phase has been analyzed. The combination of I-phase and Laves phase has higher contribution to the improvement of yield strength, which made the Mg94.4Zn3.5Gd0.6Cu1.5 alloy exhibits strong heat resistance. The results show that the two alloys have different heat treatment effect due to different fraction of I-phase and Laves phase. The Mg94.4Zn3.5Gd0.6 alloy after extrusion at 673 K has higher elongation about 94% at 473 K due to higher fraction of I-phase. © 2007 Elsevier B.V. All rights reserved.

KW - Extrusion

KW - Icosahedral

KW - Laves phase

KW - Mg-Zn-Gd

KW - Quasicrystal

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U2 - 10.1016/j.msea.2007.03.016

DO - 10.1016/j.msea.2007.03.016

M3 - RGC 21 - Publication in refereed journal

SN - 0921-5093

VL - 472

SP - 75

EP - 82

JO - Materials Science and Engineering A

JF - Materials Science and Engineering A

IS - 1-2

ER -

Effect of quasicrystal and Laves phases on strength and ductility of as-extruded and heat treated Mg-Zn-Gd-based alloys

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