Improving the tensile properties of extruded Mg–Ga alloy by ageing treatment

Donglei He; Hao Gong; Ziyue Zhang; Yang Zheng; Hu Zhang; Yan Li

doi:10.1016/j.pnsc.2022.09.016

Improving the tensile properties of extruded Mg–Ga alloy by ageing treatment

Donglei He
, Hao Gong
, Ziyue Zhang
, Yang Zheng^*
, Hu Zhang
, Yan Li^*

^*Corresponding author for this work

School of Materials Science and Engineering

Beihang University
Tiangong University

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

11 Scopus citations

Abstract

A hot-extruded Mg-5Ga alloy was subjected to ageing treatment at 150 °C, 190 °C and 230 °C. The microstructures and mechanical properties of the extruded and aged alloy were examined in this study. Microstructure examinations suggested that particle-shaped and rod-shaped Mg₅Ga₂ were precipitated in the alloy after peak ageing treatment. The extruded alloy showed the yield strength, ultimate tensile strength and elongation to fracture of 157.6 MPa, 248.6 MPa and 17.5%, respectively. After peak ageing, the yield strength and ultimate tensile strength can be enhanced by as much as 15.7% and 8.6% reaching 182.3 MPa and 270 MPa, respectively. The improvement of the tensile strengths is mainly attributed to the enhanced precipitation strengthening by newly formed fine Mg₅Ga₂ precipitates. The ductility of the alloy was slightly increased by peak ageing at low temperatures (150 °C and 190 °C), but remarkably decreased by peak ageing at high temperature (230 °C) due to the formation of coarsened Mg₅Ga₂ particles which easily initiated the cracks during tensile deformation.

Original language	English
Pages (from-to)	724-731
Number of pages	8
Journal	Progress in Natural Science: Materials International
Volume	32
Issue number	6
DOIs	https://doi.org/10.1016/j.pnsc.2022.09.016
State	Published - Dec 2022

Keywords

Ageing treatment
Mechanical property
Mg-Ga alloy
Microstructure

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10.1016/j.pnsc.2022.09.016

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@article{8111af84d676464fbb8b02c281ae3156,

title = "Improving the tensile properties of extruded Mg–Ga alloy by ageing treatment",

abstract = "A hot-extruded Mg-5Ga alloy was subjected to ageing treatment at 150 °C, 190 °C and 230 °C. The microstructures and mechanical properties of the extruded and aged alloy were examined in this study. Microstructure examinations suggested that particle-shaped and rod-shaped Mg5Ga2 were precipitated in the alloy after peak ageing treatment. The extruded alloy showed the yield strength, ultimate tensile strength and elongation to fracture of 157.6 MPa, 248.6 MPa and 17.5\%, respectively. After peak ageing, the yield strength and ultimate tensile strength can be enhanced by as much as 15.7\% and 8.6\% reaching 182.3 MPa and 270 MPa, respectively. The improvement of the tensile strengths is mainly attributed to the enhanced precipitation strengthening by newly formed fine Mg5Ga2 precipitates. The ductility of the alloy was slightly increased by peak ageing at low temperatures (150 °C and 190 °C), but remarkably decreased by peak ageing at high temperature (230 °C) due to the formation of coarsened Mg5Ga2 particles which easily initiated the cracks during tensile deformation.",

keywords = "Ageing treatment, Mechanical property, Mg-Ga alloy, Microstructure",

author = "Donglei He and Hao Gong and Ziyue Zhang and Yang Zheng and Hu Zhang and Yan Li",

note = "Publisher Copyright: {\textcopyright} 2022 Chinese Materials Research Society",

year = "2022",

month = dec,

doi = "10.1016/j.pnsc.2022.09.016",

language = "英语",

volume = "32",

pages = "724--731",

journal = "Progress in Natural Science: Materials International",

issn = "1002-0071",

publisher = "Elsevier B.V.",

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}

TY - JOUR

T1 - Improving the tensile properties of extruded Mg–Ga alloy by ageing treatment

AU - He, Donglei

AU - Gong, Hao

AU - Zhang, Ziyue

AU - Zheng, Yang

AU - Zhang, Hu

AU - Li, Yan

PY - 2022/12

Y1 - 2022/12

N2 - A hot-extruded Mg-5Ga alloy was subjected to ageing treatment at 150 °C, 190 °C and 230 °C. The microstructures and mechanical properties of the extruded and aged alloy were examined in this study. Microstructure examinations suggested that particle-shaped and rod-shaped Mg5Ga2 were precipitated in the alloy after peak ageing treatment. The extruded alloy showed the yield strength, ultimate tensile strength and elongation to fracture of 157.6 MPa, 248.6 MPa and 17.5%, respectively. After peak ageing, the yield strength and ultimate tensile strength can be enhanced by as much as 15.7% and 8.6% reaching 182.3 MPa and 270 MPa, respectively. The improvement of the tensile strengths is mainly attributed to the enhanced precipitation strengthening by newly formed fine Mg5Ga2 precipitates. The ductility of the alloy was slightly increased by peak ageing at low temperatures (150 °C and 190 °C), but remarkably decreased by peak ageing at high temperature (230 °C) due to the formation of coarsened Mg5Ga2 particles which easily initiated the cracks during tensile deformation.

AB - A hot-extruded Mg-5Ga alloy was subjected to ageing treatment at 150 °C, 190 °C and 230 °C. The microstructures and mechanical properties of the extruded and aged alloy were examined in this study. Microstructure examinations suggested that particle-shaped and rod-shaped Mg5Ga2 were precipitated in the alloy after peak ageing treatment. The extruded alloy showed the yield strength, ultimate tensile strength and elongation to fracture of 157.6 MPa, 248.6 MPa and 17.5%, respectively. After peak ageing, the yield strength and ultimate tensile strength can be enhanced by as much as 15.7% and 8.6% reaching 182.3 MPa and 270 MPa, respectively. The improvement of the tensile strengths is mainly attributed to the enhanced precipitation strengthening by newly formed fine Mg5Ga2 precipitates. The ductility of the alloy was slightly increased by peak ageing at low temperatures (150 °C and 190 °C), but remarkably decreased by peak ageing at high temperature (230 °C) due to the formation of coarsened Mg5Ga2 particles which easily initiated the cracks during tensile deformation.

KW - Ageing treatment

KW - Mechanical property

KW - Mg-Ga alloy

KW - Microstructure

UR - https://www.scopus.com/pages/publications/85140209659

U2 - 10.1016/j.pnsc.2022.09.016

DO - 10.1016/j.pnsc.2022.09.016

M3 - 文章

AN - SCOPUS:85140209659

SN - 1002-0071

VL - 32

SP - 724

EP - 731

JO - Progress in Natural Science: Materials International

JF - Progress in Natural Science: Materials International

IS - 6

ER -

Improving the tensile properties of extruded Mg–Ga alloy by ageing treatment

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Keywords

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