Deformation-Induced Dynamic Precipitation and Resulting Microstructure in a Mg–Zn–Ca Alloy

Yuzhou Du; Mingyi Zheng; Bailing Jiang; Kesong Zhou

doi:10.1007/s11837-018-2880-6

Deformation-Induced Dynamic Precipitation and Resulting Microstructure in a Mg–Zn–Ca Alloy

Yuzhou Du^*
, Mingyi Zheng
, Bailing Jiang
, Kesong Zhou

^*Corresponding author for this work

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

11 Scopus citations

Abstract

The microstructure of an Mg–Zn–Ca extrusion was investigated by transmission electron microscopy, and the interaction between dynamic precipitation and dynamic recrystallization was analyzed. The results showed that dynamic precipitation significantly affected the microstructure of the as-extruded Mg–Zn–Ca alloy. The pinning effects of precipitates on dislocations effectively prohibited dynamic recrystallization processes, while the grain boundary precipitate Ca₂Mg₆Zn₃, inhibited the growth of dynamically recrystallized grains. Consequently, a bimodal microstructure with fine dynamically recrystallized (DRXed) grains and elongated deformed regions was obtained for the Mg–Zn–Ca extrusion. High-resolution transmission electron microscopy indicated that the intragranular precipitate MgZn₂ had a crystal orientation relationship with α-Mg in the form of (0002)_Mg//(10–13)_MgZn2 and [1–100]_Mg//[1–210]_MgZn2, which was beneficial for strength improvement.

Original language	English
Pages (from-to)	1611-1615
Number of pages	5
Journal	JOM
Volume	70
Issue number	8
DOIs	https://doi.org/10.1007/s11837-018-2880-6
State	Published - 1 Aug 2018
Externally published	Yes

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@article{541eeca4f6fe415cbd87ef90674b6611,

title = "Deformation-Induced Dynamic Precipitation and Resulting Microstructure in a Mg–Zn–Ca Alloy",

abstract = "The microstructure of an Mg–Zn–Ca extrusion was investigated by transmission electron microscopy, and the interaction between dynamic precipitation and dynamic recrystallization was analyzed. The results showed that dynamic precipitation significantly affected the microstructure of the as-extruded Mg–Zn–Ca alloy. The pinning effects of precipitates on dislocations effectively prohibited dynamic recrystallization processes, while the grain boundary precipitate Ca2Mg6Zn3, inhibited the growth of dynamically recrystallized grains. Consequently, a bimodal microstructure with fine dynamically recrystallized (DRXed) grains and elongated deformed regions was obtained for the Mg–Zn–Ca extrusion. High-resolution transmission electron microscopy indicated that the intragranular precipitate MgZn2 had a crystal orientation relationship with α-Mg in the form of (0002)Mg//(10–13)MgZn2 and [1–100]Mg//[1–210]MgZn2, which was beneficial for strength improvement.",

author = "Yuzhou Du and Mingyi Zheng and Bailing Jiang and Kesong Zhou",

note = "Publisher Copyright: {\textcopyright} 2018, The Minerals, Metals \& Materials Society.",

year = "2018",

month = aug,

day = "1",

doi = "10.1007/s11837-018-2880-6",

language = "英语",

volume = "70",

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journal = "JOM",

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TY - JOUR

T1 - Deformation-Induced Dynamic Precipitation and Resulting Microstructure in a Mg–Zn–Ca Alloy

AU - Du, Yuzhou

AU - Zheng, Mingyi

AU - Jiang, Bailing

AU - Zhou, Kesong

PY - 2018/8/1

Y1 - 2018/8/1

N2 - The microstructure of an Mg–Zn–Ca extrusion was investigated by transmission electron microscopy, and the interaction between dynamic precipitation and dynamic recrystallization was analyzed. The results showed that dynamic precipitation significantly affected the microstructure of the as-extruded Mg–Zn–Ca alloy. The pinning effects of precipitates on dislocations effectively prohibited dynamic recrystallization processes, while the grain boundary precipitate Ca2Mg6Zn3, inhibited the growth of dynamically recrystallized grains. Consequently, a bimodal microstructure with fine dynamically recrystallized (DRXed) grains and elongated deformed regions was obtained for the Mg–Zn–Ca extrusion. High-resolution transmission electron microscopy indicated that the intragranular precipitate MgZn2 had a crystal orientation relationship with α-Mg in the form of (0002)Mg//(10–13)MgZn2 and [1–100]Mg//[1–210]MgZn2, which was beneficial for strength improvement.

AB - The microstructure of an Mg–Zn–Ca extrusion was investigated by transmission electron microscopy, and the interaction between dynamic precipitation and dynamic recrystallization was analyzed. The results showed that dynamic precipitation significantly affected the microstructure of the as-extruded Mg–Zn–Ca alloy. The pinning effects of precipitates on dislocations effectively prohibited dynamic recrystallization processes, while the grain boundary precipitate Ca2Mg6Zn3, inhibited the growth of dynamically recrystallized grains. Consequently, a bimodal microstructure with fine dynamically recrystallized (DRXed) grains and elongated deformed regions was obtained for the Mg–Zn–Ca extrusion. High-resolution transmission electron microscopy indicated that the intragranular precipitate MgZn2 had a crystal orientation relationship with α-Mg in the form of (0002)Mg//(10–13)MgZn2 and [1–100]Mg//[1–210]MgZn2, which was beneficial for strength improvement.

UR - https://www.scopus.com/pages/publications/85046449919

U2 - 10.1007/s11837-018-2880-6

DO - 10.1007/s11837-018-2880-6

M3 - 文章

AN - SCOPUS:85046449919

SN - 1047-4838

VL - 70

SP - 1611

EP - 1615

JO - JOM

JF - JOM

IS - 8

ER -

Deformation-Induced Dynamic Precipitation and Resulting Microstructure in a Mg–Zn–Ca Alloy

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