Precipitation of -NiAl/Laves eutectics in a Ru-containing single crystal Ni-Based superalloy

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	Precipitation of -NiAl/Laves eutectics in a Ru-containing single crystal Ni-Based superalloy
	X. P.; Tan Tan, Y. J.; Liu, J. L.; Jin, T.
	2015
发表期刊	Metals and Materials International
ISSN	1598-9623
卷号	21 期号:2 页码:222-226
摘要	The precipitation of B2 -NiAl/C14-Laves eutectics with a volume fraction of similar to 0.5% in the interdendritic gamma/gamma' eutectic regions of a 3 wt% Ru-containing single crystal Ni-based superalloy has been characterized. It is found that the eutectic reaction Liquid ->+Laves (C14) takes place at the end of solidification process. Transmission electron microscopy image shows that numerous fine "butterfly-like" Laves precipitates with a size of similar to 30 nm are embedded in the coarse blocky -NiAl, suggesting a coherent or semi-coherent interface between these two phases. The crystallography relationship of and between Laves and -NiAl phase was obtained in terms of selected area electron diffraction patterns. Electron probe microanalysis results reveal that 3 wt% Ru addition makes more Al, Ta and other refractory elements segregate to the interdendritic regions, which is believed to be the main reason for this undesirable eutectic reaction. In addition, the formation of these eutectics is found to be strongly affected by solidification conditions.
部门归属	[tan, xipeng ; liu, jinlai ; jin, tao] chinese acad sci, inst met res, superalloy div, shenyang 110016, peoples r china. [tan, xipeng ; tan, yu jun] nanyang technol univ, sch mech & aerosp engn, singapore 639798, singapore. ; tan, xp (reprint author), chinese acad sci, inst met res, superalloy div, shenyang 110016, peoples r china. ; xptan@ntu.edu.sg
关键词	Alloys Solidification Precipitation Segregation Transmission Electron Microscopy Nickel-based Superalloy Phase Ruthenium Behavior Alloys Re
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文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/73930
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	X. P.,Tan Tan, Y. J.,Liu, J. L.,et al. Precipitation of -NiAl/Laves eutectics in a Ru-containing single crystal Ni-Based superalloy[J]. Metals and Materials International,2015,21(2):222-226.
APA	X. P.,Tan Tan, Y. J.,Liu, J. L.,&Jin, T..(2015).Precipitation of -NiAl/Laves eutectics in a Ru-containing single crystal Ni-Based superalloy.Metals and Materials International,21(2),222-226.
MLA	X. P.,et al."Precipitation of -NiAl/Laves eutectics in a Ru-containing single crystal Ni-Based superalloy".Metals and Materials International 21.2(2015):222-226.