Effect of Zn, Cu and Ni addition on microstructure and mechanical properties of as-cast Mg-Dy alloys

Effect of Zn, Cu and Ni addition on microstructure and mechanical properties of as-cast Mg-Dy alloys
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Zn、Cu、Ni添加对铸态Mg-Dy合金显微组织和力学性能的影响

DOI:
10.1007/s41230-016-5062-6
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发表时间:
2016-03
期刊:
影响因子:
1.6
通讯作者:
Ying Ma
Ying Ma
中科院分区:
材料科学3区
文献类型:
--
作者:
Jian-ji Xu;Jie-ming Chen;Yuan-dong Li;Ying Ma

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本文介绍了锌、铜、镍对铸态Mg-2DY(at.%)合金组织和性能影响的研究情况。镁-2DY合金由α-镁和镁24Dy5相组成。添加0.5at.%的锌、0.5at.%的铜和0.5at.%的镍后,除α-Mg外,在α-Mg的枝晶界面上还析出了含锌、铜和镍的长周期堆积有序相。Ni的加入有效地细化了枝晶间距。铸态Mg-2DY-0.5Ni合金具有最佳的抗拉强度和延伸率。较好的力学性能主要归因于较小的二次枝晶间距(SDAS)和较高的LPSO相体积分数。
This paper presents some research information on the effects of Zn, Cu and Ni on the microstructure and mechanical properties of as-cast Mg-2Dy (at.%) alloys. The Mg-2Dy alloy is composed of α-Mg and Mg24Dy5 phases. With the addition of 0.5at.%Zn, 0.5at.%Cu and 0.5at.%Ni, respectively, besides α-Mg, the long period stacking order (LPSO) phases containing Zn, Cu, and Ni precipitated in the α-Mg interdentritic boundary. The addition of Ni effectively refined the dendrite arm spacing. The as-cast Mg-2Dy-0.5Ni alloy exhibited the best tensile strengths and elongation. The better mechanical properties were mainly attributed to small secondry dendrite arm spacing (SDAS) and high volume fraction of LPSO phases.
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