Microstructure and mechanical properties of extruded and aged Mg-Y-Cu alloy

doi:10.11817/j.ysxb.1004.0609.2021-42204

	Microstructure and mechanical properties of extruded and aged Mg-Y-Cu alloy
	Bi, Guang-Li1,2 ; Zhang, Niu-Ming 1,2; Jiang, Jing1,2 ; Chen, Ti-Jun1,2 ; Jiang, Chun-Hong 3; Li, Yuan-Dong1,2
	2022-03-28
发表期刊	Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals
ISSN	1004-0609
卷号	32 期号:3 页码:731-740
摘要	The microstructure and mechanical properties of the extruded and aged Mg-6.8Y-2.5Cu alloys were investigated by optical microscope (OM), scanning electron microscope (SEM), transmission electron microscope (TEM), X-ray diffractometer (XRD), Vickers micro-hardness tester and tensile testing machine. The results show that the extruded alloy is mainly composed of α-Mg matrix, lamellar and block 18R type long-period stacking ordered (18R-LPSO) phase distributes along the extrusion direction, Mg2Cu phase and the fine striped 14H-LPSO phase in the grain interior. During the 180 isothermal aging process, parts of metastable 18R-LPSO phases occurrs to dissolve and the new 14H-LPSO phase precipitated in Mg matrix. Two hardness peaks of the extruded alloy appear at 58 h and 130 h, and hardness values are 69.2 HV and 70.2 HV, respectively. The first ageing peak arises from a great number of 18R-LPSO phases and small amounts of 14H-LPSO phases. The second aging peak originates from the precipitation of a large number of 14H-LPSO phases in the grain interior. The tensile test results show that the extruded alloy aged for 130 h exhibits the highest ultimate tensile strength (276.8 MPa) and elongation (25.9%) at room temperature. The good tensile strengths of the alloy are mainly attributed to the precipitation strengthening of the 14H-LPSO phase and the dispersion strengthening of the 18R-LPSO phase. © 2022, China Science Publishing & Media Ltd. All right reserved.
关键词	Binary alloys Magnesium alloys Materials testing apparatus Metastable phases Microhardness Microstructure Precipitation (chemical) Scanning electron microscopy Tensile strength Tensile testing Ternary alloys Transmission electron microscopy Yttrium alloys Extruded alloys Extruded mg-Y-cu alloy Grain interiors Long period stacking ordered phase LPSO phase Mg matrix Microscope scanning Microstructures and mechanical properties Optical microscopes Transmission electron
DOI	10.11817/j.ysxb.1004.0609.2021-42204
收录类别	EI
语种	中文
出版者	Central South University of Technology
EI入藏号	20222012106548
EI主题词	Copper alloys
EI分类号	542.2 Magnesium and Alloys ; 544.2 Copper Alloys ; 549.2 Alkaline Earth Metals ; 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals ; 801.4 Physical Chemistry ; 802.3 Chemical Operations ; 931.2 Physical Properties of Gases, Liquids and Solids ; 951 Materials Science
引用统计	无
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/158412
专题	材料科学与工程学院兰州理工大学
作者单位	1.State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou; 730050, China; 2.School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou; 730050, China; 3.Lanshi Foundry Co., Ltd., Lanzhou; 730050, China
第一作者单位	兰州理工大学; 材料科学与工程学院
第一作者的第一单位	兰州理工大学
推荐引用方式 GB/T 7714	Bi, Guang-Li,Zhang, Niu-Ming,Jiang, Jing,et al. Microstructure and mechanical properties of extruded and aged Mg-Y-Cu alloy[J]. Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals,2022,32(3):731-740.
APA	Bi, Guang-Li,Zhang, Niu-Ming,Jiang, Jing,Chen, Ti-Jun,Jiang, Chun-Hong,&Li, Yuan-Dong.(2022).Microstructure and mechanical properties of extruded and aged Mg-Y-Cu alloy.Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals,32(3),731-740.
MLA	Bi, Guang-Li,et al."Microstructure and mechanical properties of extruded and aged Mg-Y-Cu alloy".Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals 32.3(2022):731-740.