Microstructure and mechanical properties of Mg-7Zn-3Al alloy with Nd and Y additions

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	Microstructure and mechanical properties of Mg-7Zn-3Al alloy with Nd and Y additions
其他题名	Microstructure and mechanical properties of Mg-7Zn-3Al alloy with Nd and Y additions
	Luo Jinhua 1; Qiu Kehui 1; Wang Jie 2; Dong Xuguang 2; Li Fensheng 1
	2012
发表期刊	JOURNAL OF RARE EARTHS
ISSN	1002-0721
卷号	30 期号:5 页码:486-491
摘要	The effects of combined addition of 0.6 wt.% Nd and 0.4 wt.% Y on the microstructure and mechanical properties of Mg-7Zn-3Al alloy were investigated. The results indicated that the Nd and Y addition led to obvious dendrite coarsening. However, it could modify the morphology and distribution of tau-Mg-32(Al,Zn)(49) intermetallics. Moreover, Al2REZn2 phase could be introduced into the alloy with the Nd and Y addition. With the effective second-phase strengthening, the ultimate tensile strength and elongation in as-cast state can be improved by the Nd and Y addition. After ageing treatment, the alloy with the Nd and Y addition exhibited better precipitation strengthening effects by forming finer MgZn2 and Mg-32(Al,Zn)(49) precipitates into the alpha-Mg matrix. As a result, the yield and ultimate strength of Mg-7Zn-3Al-0.6Nd-0.4Y alloy could be increased to 182 and 300 MPa by peak-ageing treatment.
其他摘要	The effects of combined addition of 0.6 wt.% Nd and 0.4 wt.% Y on the microstructure and mechanical properties of Mg-7Zn-3Al alloy were investigated.The results indicated that the Nd and Y addition led to obvious dendrite coarsening.However,it could modify the morphology and distribution of-Mg_(32)(Al,Zn)_(49) intermetallics.Moreover,Al_2REZn_2 phase could be introduced into the alloy with the Nd and Y addition.With the effective second-phase strengthening,the ultimate tensile strength and elongation in as-cast state can be improved by the Nd and Y addition.After ageing treatment,the alloy with the Nd and Y addition exhibited better precipitation strengthening effects by forming finer MgZn_2 and Mg_(32)(Al,Zn)_(49) precipitates into the-Mg matrix.As a result,the yield and ultimate strength of Mg-7Zn3Al-0.6Nd-0.4Y alloy could be increased to 182 and 300 MPa by peak-ageing treatment.
关键词	ZN-AL ALLOYS MAGNESIUM ALLOY BEHAVIOR CREEP Mg-7Zn-3Al alloy microstructure mechanical properties rare earths
收录类别	CSCD
语种	英语
CSCD记录号	CSCD:4557984
引用统计	被引频次：9[CSCD] [CSCD记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/153453
专题	中国科学院金属研究所
作者单位	1.Chengdu Univ Technol, Institute Mat Sci & Engn, Chengdu 610059, Peoples R China 2.中国科学院金属研究所
推荐引用方式 GB/T 7714	Luo Jinhua,Qiu Kehui,Wang Jie,et al. Microstructure and mechanical properties of Mg-7Zn-3Al alloy with Nd and Y additions[J]. JOURNAL OF RARE EARTHS,2012,30(5):486-491.
APA	Luo Jinhua,Qiu Kehui,Wang Jie,Dong Xuguang,&Li Fensheng.(2012).Microstructure and mechanical properties of Mg-7Zn-3Al alloy with Nd and Y additions.JOURNAL OF RARE EARTHS,30(5),486-491.
MLA	Luo Jinhua,et al."Microstructure and mechanical properties of Mg-7Zn-3Al alloy with Nd and Y additions".JOURNAL OF RARE EARTHS 30.5(2012):486-491.