Microstructure and yield phenomenon of an extruded Mg-Y-Cu alloy with LPSO phase

doi:10.1016/j.jre.2022.01.011

	Microstructure and yield phenomenon of an extruded Mg-Y-Cu alloy with LPSO phase
	Bi, Guangli 1,3; Zhang, Niuming 1,3; Jiang, Jing 1,3; Li, Yuandong 1,3; Chen, Tijun 1,3; Fu, Wei 2; Zhang, Xiaoru 2; Fang, Daqing 2; Ding, Xiangdong 2
刊名	Journal of Rare Earths
	2022
关键词	Binary alloys Copper alloys Extrusion Grain boundaries Magnesium alloys Rare earths Strain rate Tensile strength Tensile testing Ternary alloys Cast alloys Dendritic grains Eutectic phase Extruded mg-6.8y-2.5cu alloy Grain interiors Grain-boundaries Long-period stacking order phase Rare-earths Strain-rates Yield phenomenon
ISSN号	1002-0721
DOI	10.1016/j.jre.2022.01.011
英文摘要	A yield phenomenon was firstly reported in an extruded Mg-6.8Y-2.5Cu alloy and the corresponding microstructure was also investigated in this work. The cast alloy is mainly composed of α-Mg, 18R long period stacking order (LPSO) phase, eutectic phase (Mg20Cu4Y1), and Mg2Cu phase. The 18R LPSO phase at the dendritic grain boundary transforms into the 14H LPSO phase in the grain interior during homogenization. After extrusion, the grain size of the homogenized alloy is remarkably refined to –3.69 μm and the second phase is significantly broken and distributed in the extrusion direction. Tensile testing curves of the extrude alloy at room temperature indicate that the yield strength and ultimate tensile strength increase while the elongation of the alloy decreases with increasing strain rate. Interestingly, a yield plateau forms and gradually decreases with increasing strain rate. The yield phenomenon is related to the dislocation multiplication and the interaction between the movable dislocations and solute atoms. © 2022
语种	英语
出版者	Editorial Office of Chinese Rare Earths
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/159768]
专题	材料科学与工程学院
作者单位	1.State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou; 730050, China; 2.State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an; 710049, China 3.School of Material Science and Engineering, Lanzhou University of Technology, Lanzhou; 730050, China;
推荐引用方式 GB/T 7714	Bi, Guangli,Zhang, Niuming,Jiang, Jing,et al. Microstructure and yield phenomenon of an extruded Mg-Y-Cu alloy with LPSO phase[J]. Journal of Rare Earths,2022.
APA	Bi, Guangli.,Zhang, Niuming.,Jiang, Jing.,Li, Yuandong.,Chen, Tijun.,...&Ding, Xiangdong.(2022).Microstructure and yield phenomenon of an extruded Mg-Y-Cu alloy with LPSO phase.Journal of Rare Earths.
MLA	Bi, Guangli,et al."Microstructure and yield phenomenon of an extruded Mg-Y-Cu alloy with LPSO phase".Journal of Rare Earths (2022).