Dynamic tensile properties and microstructural evolution of extruded EW75 magnesium alloy at high strain rates

Jincheng Yu; Bo Song; Dabiao Xia; Xun Zeng; Yuanding Huang; Norbert Hort; Pingli Mao; Zheng Liu

doi:10.1016/j.jma.2020.02.013

Dynamic tensile properties and microstructural evolution of extruded EW75 magnesium alloy at high strain rates

Jincheng Yu^*
, Bo Song
, Dabiao Xia
, Xun Zeng
, Yuanding Huang
, Norbert Hort
, Pingli Mao
, Zheng Liu

^*Corresponding author for this work

Research output: Journal contributions › Journal articles › Research › peer-review

46 Citations (Scopus)

Abstract

The dynamic tensile properties and microstructural evolution of an extruded EW75 magnesium alloy deformed at ambient temperature and different high strain rates (from 1000 to 3000 s-1) along extrusion direction (ED) were investigated by Split Hopkinson Tension Bar (SHTB). The corresponding deformation mechanisms, texture evolution and microstructure changes were analyzed by optical microscope (OM), electron backscatter diffraction (EBSD) and transmission electron microscope (TEM). The results show that the extruded EW75 magnesium alloy along ED exhibits a conventional positive strain rate sensitivity that the dynamic flow stresses increase with increasing strain rate. Texture measurements show that after dynamic tension, the initial weak texture of extruded EW75 magnesium alloy tansforms to a relatively strong <10-10>//ED texture with increasing strain rates. The microstructural analysis demonstrates that dislocation motion are main deformatin mode to accommodate dynamic tensile deformation at high strain rates. In addition, the interactions of dislocation-dislocation and dislocation-second phase lead to the increase of flow stress and strain hardening with increasing strain rate.

Original language	English
Journal	Journal of Magnesium and Alloys
Volume	8
Issue number	3
Pages (from-to)	849-859
Number of pages	11
ISSN	2213-9567
DOIs	https://doi.org/10.1016/j.jma.2020.02.013
Publication status	Published - 01.09.2020
Externally published	Yes

Bibliographical note

The authors would like to thank Professor Kui Zhang, Beijing General Research Institute for Nonferrous Metal, for providing EW75 magnesium alloy for this work and acknowledge the funding from the Natural Science Foundation of the Jiangsu Higher Education Institutions of China (Grant No. 17KJD430006), Scientific and Technological Innovation Team Foundation of Wuxi Institute of Technology (No. 30593118001) and Scientific Research Project of Wuxi Institute of Technology (No. ZK201901). The help of EBSD experiment provided by Yukyung Shin from Helmholtz-Zentrum Geesthacht is gratefully acknowledged.

Publisher Copyright:
© 2020

Research areas and keywords

EW75 magnesium alloy
High strain rates
Microstructure
Split Hopkinson test
Texture
Engineering

ASJC Scopus Subject Areas

Metals and Alloys
Mechanics of Materials

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10.1016/j.jma.2020.02.013Licence: CC BY-NC-ND

Cite this

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title = "Dynamic tensile properties and microstructural evolution of extruded EW75 magnesium alloy at high strain rates",

abstract = "The dynamic tensile properties and microstructural evolution of an extruded EW75 magnesium alloy deformed at ambient temperature and different high strain rates (from 1000 to 3000 s-1) along extrusion direction (ED) were investigated by Split Hopkinson Tension Bar (SHTB). The corresponding deformation mechanisms, texture evolution and microstructure changes were analyzed by optical microscope (OM), electron backscatter diffraction (EBSD) and transmission electron microscope (TEM). The results show that the extruded EW75 magnesium alloy along ED exhibits a conventional positive strain rate sensitivity that the dynamic flow stresses increase with increasing strain rate. Texture measurements show that after dynamic tension, the initial weak texture of extruded EW75 magnesium alloy tansforms to a relatively strong <10-10>//ED texture with increasing strain rates. The microstructural analysis demonstrates that dislocation motion are main deformatin mode to accommodate dynamic tensile deformation at high strain rates. In addition, the interactions of dislocation-dislocation and dislocation-second phase lead to the increase of flow stress and strain hardening with increasing strain rate.",

keywords = "EW75 magnesium alloy, High strain rates, Microstructure, Split Hopkinson test, Texture, Engineering",

author = "Jincheng Yu and Bo Song and Dabiao Xia and Xun Zeng and Yuanding Huang and Norbert Hort and Pingli Mao and Zheng Liu",

note = "The authors would like to thank Professor Kui Zhang, Beijing General Research Institute for Nonferrous Metal, for providing EW75 magnesium alloy for this work and acknowledge the funding from the Natural Science Foundation of the Jiangsu Higher Education Institutions of China (Grant No. 17KJD430006), Scientific and Technological Innovation Team Foundation of Wuxi Institute of Technology (No. 30593118001) and Scientific Research Project of Wuxi Institute of Technology (No. ZK201901). The help of EBSD experiment provided by Yukyung Shin from Helmholtz-Zentrum Geesthacht is gratefully acknowledged. Publisher Copyright: {\textcopyright} 2020",

year = "2020",

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doi = "10.1016/j.jma.2020.02.013",

language = "English",

volume = "8",

pages = "849--859",

journal = "Journal of Magnesium and Alloys",

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T1 - Dynamic tensile properties and microstructural evolution of extruded EW75 magnesium alloy at high strain rates

AU - Yu, Jincheng

AU - Song, Bo

AU - Xia, Dabiao

AU - Zeng, Xun

AU - Huang, Yuanding

AU - Hort, Norbert

AU - Mao, Pingli

AU - Liu, Zheng

N1 - The authors would like to thank Professor Kui Zhang, Beijing General Research Institute for Nonferrous Metal, for providing EW75 magnesium alloy for this work and acknowledge the funding from the Natural Science Foundation of the Jiangsu Higher Education Institutions of China (Grant No. 17KJD430006), Scientific and Technological Innovation Team Foundation of Wuxi Institute of Technology (No. 30593118001) and Scientific Research Project of Wuxi Institute of Technology (No. ZK201901). The help of EBSD experiment provided by Yukyung Shin from Helmholtz-Zentrum Geesthacht is gratefully acknowledged. Publisher Copyright: © 2020

PY - 2020/9/1

Y1 - 2020/9/1

N2 - The dynamic tensile properties and microstructural evolution of an extruded EW75 magnesium alloy deformed at ambient temperature and different high strain rates (from 1000 to 3000 s-1) along extrusion direction (ED) were investigated by Split Hopkinson Tension Bar (SHTB). The corresponding deformation mechanisms, texture evolution and microstructure changes were analyzed by optical microscope (OM), electron backscatter diffraction (EBSD) and transmission electron microscope (TEM). The results show that the extruded EW75 magnesium alloy along ED exhibits a conventional positive strain rate sensitivity that the dynamic flow stresses increase with increasing strain rate. Texture measurements show that after dynamic tension, the initial weak texture of extruded EW75 magnesium alloy tansforms to a relatively strong <10-10>//ED texture with increasing strain rates. The microstructural analysis demonstrates that dislocation motion are main deformatin mode to accommodate dynamic tensile deformation at high strain rates. In addition, the interactions of dislocation-dislocation and dislocation-second phase lead to the increase of flow stress and strain hardening with increasing strain rate.

AB - The dynamic tensile properties and microstructural evolution of an extruded EW75 magnesium alloy deformed at ambient temperature and different high strain rates (from 1000 to 3000 s-1) along extrusion direction (ED) were investigated by Split Hopkinson Tension Bar (SHTB). The corresponding deformation mechanisms, texture evolution and microstructure changes were analyzed by optical microscope (OM), electron backscatter diffraction (EBSD) and transmission electron microscope (TEM). The results show that the extruded EW75 magnesium alloy along ED exhibits a conventional positive strain rate sensitivity that the dynamic flow stresses increase with increasing strain rate. Texture measurements show that after dynamic tension, the initial weak texture of extruded EW75 magnesium alloy tansforms to a relatively strong <10-10>//ED texture with increasing strain rates. The microstructural analysis demonstrates that dislocation motion are main deformatin mode to accommodate dynamic tensile deformation at high strain rates. In addition, the interactions of dislocation-dislocation and dislocation-second phase lead to the increase of flow stress and strain hardening with increasing strain rate.

KW - EW75 magnesium alloy

KW - High strain rates

KW - Microstructure

KW - Split Hopkinson test

KW - Texture

KW - Engineering

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DO - 10.1016/j.jma.2020.02.013

M3 - Journal articles

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SN - 2213-9567

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EP - 859

JO - Journal of Magnesium and Alloys

JF - Journal of Magnesium and Alloys

IS - 3

ER -

Dynamic tensile properties and microstructural evolution of extruded EW75 magnesium alloy at high strain rates

Abstract

Bibliographical note

Research areas and keywords

ASJC Scopus Subject Areas

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