Effects of Cu addition on microstructure and mechanical properties of as-cast Mg-6Zn magnesium alloy

doi:10.1007/s41230-017-6094-2

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	Effects of Cu addition on microstructure and mechanical properties of as-cast Mg-6Zn magnesium alloy
	Zhang, Yu; Huang, Xiao-feng; Ma, Ying; Chen, Ti-jun; Li, Yuan-dong; Hao, Yuan
	2017-07
发表期刊	CHINA FOUNDRY
ISSN	1672-6421
卷号	14 期号:4 页码:251-257
摘要	The application of Mg-Zn binary alloys is restricted due to their developed dendritic microstructure and poor mechanical properties. In this study, an alloying method was used to improve the mechanical properties of Mg-Zn alloy. The Mg-6Zn magnesium alloys microalloyed with varying Cu content (0, 0.8, 1.5, 2.0 and 2.5wt.%) were fabricated by permanent mould casting, and the effects of Cu content on the microstructure and mechanical properties of as-cast Mg-6Zn alloys were studied using OM, SEM, XRD and tensile tests at room temperature. The obtained results show that the addition of Cu not only can refine the grains effectively, but also can modify the eutectic morphology and improve the mechanical properties of the alloys. The main phases of the studied alloys include a-Mg, MgZn2, Mg2Cu and CuMgZn. When the content of Cu exceeds 0.8wt.%, Mg2Cu phase appears. Meanwhile, the eutectic morphology is modified into dendritic shape or lamellar structure, which has an adverse effect on the tensile properties. Furthermore, among the investigated alloys, the alloy containing 0.8% Cu shows an optimal ultimate tensile strength of 196 MPa, while the alloy with 1.5wt.% Cu obtains an excellent elongation of 7.22%. The experimental alloys under different Cu contents show distinguishing fracture behaviors: the fracture of the alloy with 0.8wt.% Cu reveals a mixed mode of inter-granular and quasi-cleavage, while in other investigated alloys, the fracture behaviors are dominated by cleavage fracture.
关键词	Mg-Zn magnesium alloy Cu addition microstructure mechanical property fracture mode
DOI	10.1007/s41230-017-6094-2
收录类别	SCI ; SCIE
语种	英语
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000411157400003
出版者	FOUNDRY JOURNAL AGENCY
引用统计	被引频次：11[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/33201
专题	发展规划处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
通讯作者	Huang, Xiao-feng
作者单位	Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Gansu, Peoples R China
第一作者单位	省部共建有色金属先进加工与再利用国家重点实验室
通讯作者单位	省部共建有色金属先进加工与再利用国家重点实验室
第一作者的第一单位	省部共建有色金属先进加工与再利用国家重点实验室
推荐引用方式 GB/T 7714	Zhang, Yu,Huang, Xiao-feng,Ma, Ying,et al. Effects of Cu addition on microstructure and mechanical properties of as-cast Mg-6Zn magnesium alloy[J]. CHINA FOUNDRY,2017,14(4):251-257.
APA	Zhang, Yu,Huang, Xiao-feng,Ma, Ying,Chen, Ti-jun,Li, Yuan-dong,&Hao, Yuan.(2017).Effects of Cu addition on microstructure and mechanical properties of as-cast Mg-6Zn magnesium alloy.CHINA FOUNDRY,14(4),251-257.
MLA	Zhang, Yu,et al."Effects of Cu addition on microstructure and mechanical properties of as-cast Mg-6Zn magnesium alloy".CHINA FOUNDRY 14.4(2017):251-257.

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