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-Li 2,3; Zhang, Niu-Ming 2,3; Jiang, Jing 2,3; Chen, Ti-Jun 2,3; Jiang, Chun-Hong 1; Li, Yuan-Dong 2,3
刊名	Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals
	2022-03-28
卷号	32 期号:3 页码:731-740
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
ISSN号	1004-0609
DOI	10.11817/j.ysxb.1004.0609.2021-42204
英文摘要	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.
语种	中文
出版者	Central South University of Technology
内容类型	期刊论文
源URL	[http://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.Lanshi Foundry Co., Ltd., Lanzhou; 730050, China 2.State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou; 730050, China; 3.School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou; 730050, China;
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.