High-Speed Impact Behavior and Microstructure Evolution of an Extruded Mg-7Sn-5Zn-3Al Alloy

doi:10.1007/s11665-020-05162-5

	High-Speed Impact Behavior and Microstructure Evolution of an Extruded Mg-7Sn-5Zn-3Al Alloy
	Bi, Guangli 2,3; Xu, Zuocheng 2,3; Jiang, Jing 2,3; Li, Yuandong 2,3; Chen, Tijun 2,3; Fu, Wei 1; Fang, Daqing 1; Ding, Xiangdong 1
刊名	Journal of Materials Engineering and Performance
	2020-10-01
卷号	29 期号:10 页码:6427-6438
关键词	Aluminum alloys Dynamic recrystallization Dynamics Grain refinement Grain size and shape Magnesium alloys Textures Tin alloys Zinc alloysAverage grain size Dynamic recrystallization (DRX) Elongation to failure High strain rates Micro-structure evolutions Quasi cleavage fracture Split Hopkinson pressure bars Strain rate sensitivity
ISSN号	10599495
DOI	10.1007/s11665-020-05162-5
英文摘要	In this study, the high-speed impact behavior and microstructure evolution of an extruded Mg-7Sn-5Zn-3Al alloy were investigated under different strain rates (1626-4126 s−1) using a Split Hopkinson pressure bar. The experimental results indicated that the number of twins and dynamic recrystallization (DRX) increased, while the average grain size of the extruded alloy continuously decreased with the increase in the strain rates. In addition, the texture type of the extruded alloy transformed from (0001) to (11-20) during impacts. The high-speed impact behavior of the extruded alloy was found to strongly depend on the strain rate at room temperature. The strain rate sensitivity (SRS) changed from positive to negative with the increase in the strain rate. The negative SRS was mainly attributed to the DRX and the formation of micro-cracks at high strain rates (3712 s−1−1). In addition, the elongation to failure (δ) and yield strength (σ0.2) of the extruded alloy increased, while the maximum strength (σmax) exhibited a nonlinear trend with the increase in the strain rates. The improved mechanical properties mainly originated from the grain refinement and texture strengthening. Multicrack propagation and intergranular quasi-cleavage fracture were the main dynamic fracture mechanisms of the extruded alloy during impacts. © 2020, ASM International.
WOS研究方向	Materials Science
语种	英语
出版者	Springer
WOS记录号	WOS:000576702300001
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/132337]
专题	材料科学与工程学院
作者单位	1.State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an; 710049, China 2.School of Material Science and Engineering, Lanzhou University of Technology, Lanzhou; 730050, China; 3.State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou; 730050, China;
推荐引用方式 GB/T 7714	Bi, Guangli,Xu, Zuocheng,Jiang, Jing,et al. High-Speed Impact Behavior and Microstructure Evolution of an Extruded Mg-7Sn-5Zn-3Al Alloy[J]. Journal of Materials Engineering and Performance,2020,29(10):6427-6438.
APA	Bi, Guangli.,Xu, Zuocheng.,Jiang, Jing.,Li, Yuandong.,Chen, Tijun.,...&Ding, Xiangdong.(2020).High-Speed Impact Behavior and Microstructure Evolution of an Extruded Mg-7Sn-5Zn-3Al Alloy.Journal of Materials Engineering and Performance,29(10),6427-6438.
MLA	Bi, Guangli,et al."High-Speed Impact Behavior and Microstructure Evolution of an Extruded Mg-7Sn-5Zn-3Al Alloy".Journal of Materials Engineering and Performance 29.10(2020):6427-6438.