Hot compression deformation behavior of Mg-9Gd-2.9Y-1.9Zn-0.4Zr-0.2Ca (wt%) alloy

C. Xu; J. P. Pan; T. Nakata; X. G. Qiao; Y. Q. Chi; M. Y. Zheng; S. Kamado

doi:10.1016/j.matchar.2016.11.036

Hot compression deformation behavior of Mg-9Gd-2.9Y-1.9Zn-0.4Zr-0.2Ca (wt%) alloy

C. Xu^*
, J. P. Pan
, T. Nakata
, X. G. Qiao
, Y. Q. Chi
, M. Y. Zheng
, S. Kamado

^*Corresponding author for this work

Harbin Institute of Technology
Nagaoka University of Technology

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

69 Scopus citations

Abstract

Hot deformation behavior of the homogenized and quenched Mg-9Gd-2.9Y-1.9Zn-0.4Zr-0.2Ca (wt%) alloy was investigated by compression test at temperatures of 300– 500 °C and strain rates of 0.001–10 s^{− 1}. The flow stress is sensitive to the deformation temperature and strain rate, which increases with increasing strain rate and decreasing temperature. The processing map constructed at the strain of 0.9 shows two stability domains with high power dissipation efficiencies and the optimum hot working condition for the alloy is determined as deformation temperature of 450 °C and strain rate of 0.01 s^{− 1}, which correlates with the continuous dynamic recrystallization as main softening mechanism. However, dense lamellar-shaped long period stacking ordered (LPSO) phases precipitate inside original grains during preheating and deformation, which restrict the dynamic recrystallization. Consequently, dynamic recrystallization proceeds incompletely. Adiabatic shear bands and cracks formed at grain boundaries lead to the premature failure of the samples compressed at strain rate of 10 s^{− 1} in the instability domain where should be avoided during processing.

Original language	English
Pages (from-to)	40-49
Number of pages	10
Journal	Materials Characterization
Volume	124
DOIs	https://doi.org/10.1016/j.matchar.2016.11.036
State	Published - 1 Feb 2017
Externally published	Yes

Keywords

Dynamic recrystallization
LPSO phase
Magnesium alloys
Processing map
Rare earth (RE)

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10.1016/j.matchar.2016.11.036

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@article{07b00716fa9a4188928d7c33dc3ee488,

title = "Hot compression deformation behavior of Mg-9Gd-2.9Y-1.9Zn-0.4Zr-0.2Ca (wt\%) alloy",

abstract = "Hot deformation behavior of the homogenized and quenched Mg-9Gd-2.9Y-1.9Zn-0.4Zr-0.2Ca (wt\%) alloy was investigated by compression test at temperatures of 300– 500 °C and strain rates of 0.001–10 s− 1. The flow stress is sensitive to the deformation temperature and strain rate, which increases with increasing strain rate and decreasing temperature. The processing map constructed at the strain of 0.9 shows two stability domains with high power dissipation efficiencies and the optimum hot working condition for the alloy is determined as deformation temperature of 450 °C and strain rate of 0.01 s− 1, which correlates with the continuous dynamic recrystallization as main softening mechanism. However, dense lamellar-shaped long period stacking ordered (LPSO) phases precipitate inside original grains during preheating and deformation, which restrict the dynamic recrystallization. Consequently, dynamic recrystallization proceeds incompletely. Adiabatic shear bands and cracks formed at grain boundaries lead to the premature failure of the samples compressed at strain rate of 10 s− 1 in the instability domain where should be avoided during processing.",

keywords = "Dynamic recrystallization, LPSO phase, Magnesium alloys, Processing map, Rare earth (RE)",

author = "C. Xu and Pan, \{J. P.\} and T. Nakata and Qiao, \{X. G.\} and Chi, \{Y. Q.\} and Zheng, \{M. Y.\} and S. Kamado",

note = "Publisher Copyright: {\textcopyright} 2016 Elsevier Inc.",

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doi = "10.1016/j.matchar.2016.11.036",

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T1 - Hot compression deformation behavior of Mg-9Gd-2.9Y-1.9Zn-0.4Zr-0.2Ca (wt%) alloy

AU - Xu, C.

AU - Pan, J. P.

AU - Nakata, T.

AU - Qiao, X. G.

AU - Chi, Y. Q.

AU - Zheng, M. Y.

AU - Kamado, S.

PY - 2017/2/1

Y1 - 2017/2/1

N2 - Hot deformation behavior of the homogenized and quenched Mg-9Gd-2.9Y-1.9Zn-0.4Zr-0.2Ca (wt%) alloy was investigated by compression test at temperatures of 300– 500 °C and strain rates of 0.001–10 s− 1. The flow stress is sensitive to the deformation temperature and strain rate, which increases with increasing strain rate and decreasing temperature. The processing map constructed at the strain of 0.9 shows two stability domains with high power dissipation efficiencies and the optimum hot working condition for the alloy is determined as deformation temperature of 450 °C and strain rate of 0.01 s− 1, which correlates with the continuous dynamic recrystallization as main softening mechanism. However, dense lamellar-shaped long period stacking ordered (LPSO) phases precipitate inside original grains during preheating and deformation, which restrict the dynamic recrystallization. Consequently, dynamic recrystallization proceeds incompletely. Adiabatic shear bands and cracks formed at grain boundaries lead to the premature failure of the samples compressed at strain rate of 10 s− 1 in the instability domain where should be avoided during processing.

AB - Hot deformation behavior of the homogenized and quenched Mg-9Gd-2.9Y-1.9Zn-0.4Zr-0.2Ca (wt%) alloy was investigated by compression test at temperatures of 300– 500 °C and strain rates of 0.001–10 s− 1. The flow stress is sensitive to the deformation temperature and strain rate, which increases with increasing strain rate and decreasing temperature. The processing map constructed at the strain of 0.9 shows two stability domains with high power dissipation efficiencies and the optimum hot working condition for the alloy is determined as deformation temperature of 450 °C and strain rate of 0.01 s− 1, which correlates with the continuous dynamic recrystallization as main softening mechanism. However, dense lamellar-shaped long period stacking ordered (LPSO) phases precipitate inside original grains during preheating and deformation, which restrict the dynamic recrystallization. Consequently, dynamic recrystallization proceeds incompletely. Adiabatic shear bands and cracks formed at grain boundaries lead to the premature failure of the samples compressed at strain rate of 10 s− 1 in the instability domain where should be avoided during processing.

KW - Dynamic recrystallization

KW - LPSO phase

KW - Magnesium alloys

KW - Processing map

KW - Rare earth (RE)

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U2 - 10.1016/j.matchar.2016.11.036

DO - 10.1016/j.matchar.2016.11.036

M3 - 文章

AN - SCOPUS:85006372307

SN - 1044-5803

VL - 124

SP - 40

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JO - Materials Characterization

JF - Materials Characterization

ER -

Hot compression deformation behavior of Mg-9Gd-2.9Y-1.9Zn-0.4Zr-0.2Ca (wt%) alloy

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Keywords

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