Effect of Al content on non-dendritic microstructure of Mg-7Zn magnesium alloy

	Effect of Al content on non-dendritic microstructure of Mg-7Zn magnesium alloy
	Feng, Kai; Huang, Xiao-Feng; Ma, Ying; Lü, Zheng; Li, Xing-Peng; Hao, Yuan
刊名	Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals
	2013-11-01
卷号	23 期号:11 页码:3039-3047
关键词	Aluminum alloys Binary alloys Coarsening Grain boundaries Heat treatment Isotherms Ostwald ripening Particle size Ternary alloys Zinc alloys Al content Equivalent particle size Isothermal heat treatments Mg Zn Al alloys Non-dendritic microstructure Ostwald ripening mechanism Semi-solids Solid liquid equilibrium
ISSN号	10040609
英文摘要	The effect of Al addition on semi-solid microstructures of Mg-7Zn alloy was investigated by isothermal heat-treatment. The results indicate that the solid fractions of alloys are declined by elevated temperature when adding Al into Mg-7Zn alloy. With Al content increasing, the equivalent particle size gradually decreases, the roundness significantly increases and the solid fraction decreases at the same isothermal treatment process (580°C, 30 min). The non-dendritic microstructures are composed mainly of globular and similar globular primary particles α1-Mg, the finer equiaxial α2-Mg which forms from quench in water, and the eutectic distributes on the grain-boundary and within the primary solid particles. With holding time increasing, the size of primary solid particles of non-dendritic microstracture of Mg-7Zn-xAl alloy gradually increases and the shape factor decreases, which has no visible effect on the solid fraction of alloys at the solid-liquid equilibrium stage. Simultaneously, the parimary particle size coarsening with holding time obeys the Ostwald ripening mechanism, and adding Al element into Mg-7Zn alloy results in a decrease of coarsening rate of solid particles in semi-solid slurry, consequently, it can obtain the perfect semi-solid microstructure on the wide range of holding time.
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/112930]
专题	材料科学与工程学院省部共建有色金属先进加工与再利用国家重点实验室
作者单位	State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials, Lanzhou University of Technology, Lanzhou 730050, China
推荐引用方式 GB/T 7714	Feng, Kai,Huang, Xiao-Feng,Ma, Ying,et al. Effect of Al content on non-dendritic microstructure of Mg-7Zn magnesium alloy[J]. Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals,2013,23(11):3039-3047.
APA	Feng, Kai,Huang, Xiao-Feng,Ma, Ying,Lü, Zheng,Li, Xing-Peng,&Hao, Yuan.(2013).Effect of Al content on non-dendritic microstructure of Mg-7Zn magnesium alloy.Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals,23(11),3039-3047.
MLA	Feng, Kai,et al."Effect of Al content on non-dendritic microstructure of Mg-7Zn magnesium alloy".Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals 23.11(2013):3039-3047.