|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.
|Source Publication||Metals and Materials International
|Abstract||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.|
; 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.
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.
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.
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.
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