Microstructural evolution in Mg-3Gd during accumulative roll-bonding

Xuan Luo, Zongqiang Feng, Tianbo Yu, Tianlin Huang, Rongguang Li, Guilin Wu*, Niels Hansen, Xiaoxu Huang

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

An Mg-3Gd (wt. %) alloy has been deformed by accumulative roll bonding through four cycles to an equivalent strain of 3.2. The deformed microstructure has been fully characterized by advanced electron microscopy techniques and the mechanical properties are determined by tensile testing. Three characteristic microstructures have been identified and characterized as: cell blocks, twin blocks and nanograins, all with
boundary spacings of 100-200 nm. These structures illustrate a structural subdivision by low angle dislocation boundaries and high angle boundaries, which shows a clear resemblance with deformation microstructures in fcc and bcc metals deformed to high strain. The structural evolution has its origin in dislocation and twinning based plasticity which is quantified. The structure-strength relationship of this low-alloyed Mg-3Gd is analysed.
Original languageEnglish
Article number138763
JournalMaterials Science and Engineering A
Volume772
ISSN0921-5093
DOIs
Publication statusAccepted/In press - 2019

Keywords

  • Mg alloy
  • Accumulative roll bonding
  • Grain subdivision
  • Microstructure
  • Mechanical properties

Cite this

Luo, Xuan ; Feng, Zongqiang ; Yu, Tianbo ; Huang, Tianlin ; Li, Rongguang ; Wu, Guilin ; Hansen, Niels ; Huang, Xiaoxu. / Microstructural evolution in Mg-3Gd during accumulative roll-bonding. In: Materials Science and Engineering A. 2019 ; Vol. 772.
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title = "Microstructural evolution in Mg-3Gd during accumulative roll-bonding",
abstract = "An Mg-3Gd (wt. {\%}) alloy has been deformed by accumulative roll bonding through four cycles to an equivalent strain of 3.2. The deformed microstructure has been fully characterized by advanced electron microscopy techniques and the mechanical properties are determined by tensile testing. Three characteristic microstructures have been identified and characterized as: cell blocks, twin blocks and nanograins, all withboundary spacings of 100-200 nm. These structures illustrate a structural subdivision by low angle dislocation boundaries and high angle boundaries, which shows a clear resemblance with deformation microstructures in fcc and bcc metals deformed to high strain. The structural evolution has its origin in dislocation and twinning based plasticity which is quantified. The structure-strength relationship of this low-alloyed Mg-3Gd is analysed.",
keywords = "Mg alloy, Accumulative roll bonding, Grain subdivision, Microstructure, Mechanical properties",
author = "Xuan Luo and Zongqiang Feng and Tianbo Yu and Tianlin Huang and Rongguang Li and Guilin Wu and Niels Hansen and Xiaoxu Huang",
year = "2019",
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Microstructural evolution in Mg-3Gd during accumulative roll-bonding. / Luo, Xuan; Feng, Zongqiang; Yu, Tianbo; Huang, Tianlin; Li, Rongguang; Wu, Guilin; Hansen, Niels; Huang, Xiaoxu.

In: Materials Science and Engineering A, Vol. 772, 138763, 2019.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Microstructural evolution in Mg-3Gd during accumulative roll-bonding

AU - Luo, Xuan

AU - Feng, Zongqiang

AU - Yu, Tianbo

AU - Huang, Tianlin

AU - Li, Rongguang

AU - Wu, Guilin

AU - Hansen, Niels

AU - Huang, Xiaoxu

PY - 2019

Y1 - 2019

N2 - An Mg-3Gd (wt. %) alloy has been deformed by accumulative roll bonding through four cycles to an equivalent strain of 3.2. The deformed microstructure has been fully characterized by advanced electron microscopy techniques and the mechanical properties are determined by tensile testing. Three characteristic microstructures have been identified and characterized as: cell blocks, twin blocks and nanograins, all withboundary spacings of 100-200 nm. These structures illustrate a structural subdivision by low angle dislocation boundaries and high angle boundaries, which shows a clear resemblance with deformation microstructures in fcc and bcc metals deformed to high strain. The structural evolution has its origin in dislocation and twinning based plasticity which is quantified. The structure-strength relationship of this low-alloyed Mg-3Gd is analysed.

AB - An Mg-3Gd (wt. %) alloy has been deformed by accumulative roll bonding through four cycles to an equivalent strain of 3.2. The deformed microstructure has been fully characterized by advanced electron microscopy techniques and the mechanical properties are determined by tensile testing. Three characteristic microstructures have been identified and characterized as: cell blocks, twin blocks and nanograins, all withboundary spacings of 100-200 nm. These structures illustrate a structural subdivision by low angle dislocation boundaries and high angle boundaries, which shows a clear resemblance with deformation microstructures in fcc and bcc metals deformed to high strain. The structural evolution has its origin in dislocation and twinning based plasticity which is quantified. The structure-strength relationship of this low-alloyed Mg-3Gd is analysed.

KW - Mg alloy

KW - Accumulative roll bonding

KW - Grain subdivision

KW - Microstructure

KW - Mechanical properties

U2 - 10.1016/j.msea.2019.138763

DO - 10.1016/j.msea.2019.138763

M3 - Journal article

VL - 772

JO - Materials Science and Engineering: A - Structural Materials: Properties, Microstructure and Processing

JF - Materials Science and Engineering: A - Structural Materials: Properties, Microstructure and Processing

SN - 0921-5093

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ER -