Modifying microstructures and tensile properties of Mg-Sm based alloy via extrusion ratio

Modifying microstructures and tensile properties of Mg-Sm based alloy via extrusion ratio

Microstructure and tensile properties of a Mg-Sm-Zn-Zr alloy with various extrusion ratios (ERs) of 6.9, 10.4 and 17.6 were systematically investigated. It was identified that, greater ER increased dynamic recrystallization (DRX) fraction and coarsened DRX grains, which further suggests weakened bas...

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Main Authors: Kai Guan, Rui Ma, Jinghuai Zhang, Ruizhi Wu, Qiang Yang, Jian Meng
Format: Article
Language:English
Published: KeAi Communications Co., Ltd. 2021-05-01
Series:Journal of Magnesium and Alloys
Subjects:
Magnesium alloys
Extrusion ratio
Microstructure
Phase transition
Transmission electron microscopy
Tensile properties
Online Access:http://www.sciencedirect.com/science/article/pii/S2213956721000141
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spelling doaj-a1cf9d71577c4bbf8704465fdb8e910c2021-07-03T04:46:01ZengKeAi Communications Co., Ltd.Journal of Magnesium and Alloys2213-95672021-05-019310981109Modifying microstructures and tensile properties of Mg-Sm based alloy via extrusion ratioKai Guan0Rui Ma1Jinghuai Zhang2Ruizhi Wu3Qiang Yang4Jian Meng5Key Laboratory of Superlight Material and Surface Technology, Ministry of Education, College of Material Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, PR China; Department of Materials Engineering, The University of Tokyo, Tokyo 113-8656, Japan; State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, PR ChinaState Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, PR ChinaKey Laboratory of Superlight Material and Surface Technology, Ministry of Education, College of Material Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, PR China; Corresponding authors.Key Laboratory of Superlight Material and Surface Technology, Ministry of Education, College of Material Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, PR ChinaState Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, PR China; Corresponding authors.State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, PR ChinaMicrostructure and tensile properties of a Mg-Sm-Zn-Zr alloy with various extrusion ratios (ERs) of 6.9, 10.4 and 17.6 were systematically investigated. It was identified that, greater ER increased dynamic recrystallization (DRX) fraction and coarsened DRX grains, which further suggests weakened basal fiber texture for the studied alloy. This is mainly due to the rising temperature from massive deformation heat when hot-extrusion. As a result, greater ER corresponds to a decreased strength but improved ductility. Finally, transmission electron microscopy (TEM) observations reveal that the dominant intermetallic phase, Mg3Sm, is metastable, and it will transform into Mg41Sm5 during extrusion with high-ER. This transformation leads to the accumulation of surplus Sm and Zn atoms, which induces the precipitation of SmZn3 phase at the surface of Mg41Sm5 matrix.http://www.sciencedirect.com/science/article/pii/S2213956721000141Magnesium alloysExtrusion ratioMicrostructurePhase transitionTransmission electron microscopyTensile properties
collection DOAJ
language English
format Article
sources DOAJ
author Kai Guan
Rui Ma
Jinghuai Zhang
Ruizhi Wu
Qiang Yang
Jian Meng
spellingShingle Kai Guan
Rui Ma
Jinghuai Zhang
Ruizhi Wu
Qiang Yang
Jian Meng
Modifying microstructures and tensile properties of Mg-Sm based alloy via extrusion ratio
Journal of Magnesium and Alloys
Magnesium alloys
Extrusion ratio
Microstructure
Phase transition
Transmission electron microscopy
Tensile properties
author_facet Kai Guan
Rui Ma
Jinghuai Zhang
Ruizhi Wu
Qiang Yang
Jian Meng
author_sort Kai Guan
title Modifying microstructures and tensile properties of Mg-Sm based alloy via extrusion ratio
title_short Modifying microstructures and tensile properties of Mg-Sm based alloy via extrusion ratio
title_full Modifying microstructures and tensile properties of Mg-Sm based alloy via extrusion ratio
title_fullStr Modifying microstructures and tensile properties of Mg-Sm based alloy via extrusion ratio
title_full_unstemmed Modifying microstructures and tensile properties of Mg-Sm based alloy via extrusion ratio
title_sort modifying microstructures and tensile properties of mg-sm based alloy via extrusion ratio
publisher KeAi Communications Co., Ltd.
series Journal of Magnesium and Alloys
issn 2213-9567
publishDate 2021-05-01
description Microstructure and tensile properties of a Mg-Sm-Zn-Zr alloy with various extrusion ratios (ERs) of 6.9, 10.4 and 17.6 were systematically investigated. It was identified that, greater ER increased dynamic recrystallization (DRX) fraction and coarsened DRX grains, which further suggests weakened basal fiber texture for the studied alloy. This is mainly due to the rising temperature from massive deformation heat when hot-extrusion. As a result, greater ER corresponds to a decreased strength but improved ductility. Finally, transmission electron microscopy (TEM) observations reveal that the dominant intermetallic phase, Mg3Sm, is metastable, and it will transform into Mg41Sm5 during extrusion with high-ER. This transformation leads to the accumulation of surplus Sm and Zn atoms, which induces the precipitation of SmZn3 phase at the surface of Mg41Sm5 matrix.
topic Magnesium alloys
Extrusion ratio
Microstructure
Phase transition
Transmission electron microscopy
Tensile properties
url http://www.sciencedirect.com/science/article/pii/S2213956721000141
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