Deformation behaviour of 18R long-period stacking ordered structure in an Mg-Zn-Y alloy under shock loading

Fan Zhang; Yu Ren; Shoucong Ning; Yuan Tian; Weiwei Hu; Chengwen Tan; Takeshi Fujita; Akihiko Hirata; Mingwei Chen

doi:10.1016/j.intermet.2018.08.007

Deformation behaviour of 18R long-period stacking ordered structure in an Mg-Zn-Y alloy under shock loading

Fan Zhang, Yu Ren, Shoucong Ning, Yuan Tian, Weiwei Hu, Chengwen Tan, Takeshi Fujita, Akihiko Hirata, Mingwei Chen^*

^*Corresponding author for this work

School of Material Science and Engineering

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

3 Citations (Scopus)

Abstract

The deformation microstructure of an interdendritic18 R long-period stacking ordered (LPSO) phase in an Mg-Zn-Y alloy subjected to shock loading was investigated by transmission electron microscopy. It was found that kink banding, the key deformation mode of LPSO phases under quasi-static loading, is suppressed by shock loading. Instead, second-order pyramidal slip by <c+a> dislocations, which has not been observed in LPSO before, contributes to the plastic deformation of LPSO, in addition to the <a> dislocations. The rate-dependent deformation modes of LPSO have an important implication in understanding the mechanical behaviour of LPSO strengthened Mg alloys under extreme loading conditions.

Original language	English
Pages (from-to)	21-25
Number of pages	5
Journal	Intermetallics
Volume	102
DOIs	https://doi.org/10.1016/j.intermet.2018.08.007
Publication status	Published - Nov 2018

Keywords

Dislocation
Electron microscopy
Intermetallics
Microstructure
Plastic deformation mechanisms

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10.1016/j.intermet.2018.08.007

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title = "Deformation behaviour of 18R long-period stacking ordered structure in an Mg-Zn-Y alloy under shock loading",

abstract = "The deformation microstructure of an interdendritic18 R long-period stacking ordered (LPSO) phase in an Mg-Zn-Y alloy subjected to shock loading was investigated by transmission electron microscopy. It was found that kink banding, the key deformation mode of LPSO phases under quasi-static loading, is suppressed by shock loading. Instead, second-order pyramidal slip by dislocations, which has not been observed in LPSO before, contributes to the plastic deformation of LPSO, in addition to the dislocations. The rate-dependent deformation modes of LPSO have an important implication in understanding the mechanical behaviour of LPSO strengthened Mg alloys under extreme loading conditions.",

keywords = "Dislocation, Electron microscopy, Intermetallics, Microstructure, Plastic deformation mechanisms",

author = "Fan Zhang and Yu Ren and Shoucong Ning and Yuan Tian and Weiwei Hu and Chengwen Tan and Takeshi Fujita and Akihiko Hirata and Mingwei Chen",

note = "Publisher Copyright: {\textcopyright} 2018 Elsevier Ltd",

year = "2018",

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doi = "10.1016/j.intermet.2018.08.007",

language = "English",

volume = "102",

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journal = "Intermetallics",

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T1 - Deformation behaviour of 18R long-period stacking ordered structure in an Mg-Zn-Y alloy under shock loading

AU - Zhang, Fan

AU - Ren, Yu

AU - Ning, Shoucong

AU - Tian, Yuan

AU - Hu, Weiwei

AU - Tan, Chengwen

AU - Fujita, Takeshi

AU - Hirata, Akihiko

AU - Chen, Mingwei

PY - 2018/11

Y1 - 2018/11

N2 - The deformation microstructure of an interdendritic18 R long-period stacking ordered (LPSO) phase in an Mg-Zn-Y alloy subjected to shock loading was investigated by transmission electron microscopy. It was found that kink banding, the key deformation mode of LPSO phases under quasi-static loading, is suppressed by shock loading. Instead, second-order pyramidal slip by dislocations, which has not been observed in LPSO before, contributes to the plastic deformation of LPSO, in addition to the dislocations. The rate-dependent deformation modes of LPSO have an important implication in understanding the mechanical behaviour of LPSO strengthened Mg alloys under extreme loading conditions.

AB - The deformation microstructure of an interdendritic18 R long-period stacking ordered (LPSO) phase in an Mg-Zn-Y alloy subjected to shock loading was investigated by transmission electron microscopy. It was found that kink banding, the key deformation mode of LPSO phases under quasi-static loading, is suppressed by shock loading. Instead, second-order pyramidal slip by dislocations, which has not been observed in LPSO before, contributes to the plastic deformation of LPSO, in addition to the dislocations. The rate-dependent deformation modes of LPSO have an important implication in understanding the mechanical behaviour of LPSO strengthened Mg alloys under extreme loading conditions.

KW - Dislocation

KW - Electron microscopy

KW - Intermetallics

KW - Microstructure

KW - Plastic deformation mechanisms

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DO - 10.1016/j.intermet.2018.08.007

M3 - Article

AN - SCOPUS:85052110858

SN - 0966-9795

VL - 102

SP - 21

EP - 25

JO - Intermetallics

JF - Intermetallics

ER -

Deformation behaviour of 18R long-period stacking ordered structure in an Mg-Zn-Y alloy under shock loading

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Keywords

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