Microstructure and mechanical properties of rapidly solidified NiAl–Cr(Mo) eutectic alloy doped with trace Dy

The Ni–33Al–28Cr–6Mo eutectic alloy doped with trace Dy was prepared by conventionally casting and injection casting techniques. Microstructure examination revealed that with the addition of Dy, the Ni 5Dy phase precipitated along the NiAl and Cr(Mo) phases interface in the intercellular region. Com...

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Bibliographic Details
Published in:Journal of alloys and compounds 2009-05, Vol.475 (1), p.730-734
Main Authors: Sheng, L.Y., Guo, J.T., Tian, Y.X., Zhou, L.Z., Ye, H.Q.
Format: Article
Language:English
Subjects:
Condensed matter: structure, mechanical and thermal properties
Exact sciences and technology
Intermetallics
Mechanical and acoustical properties
Mechanical and acoustical properties of condensed matter
Mechanical properties
Microstructure
Physical properties of thin films, nonelectronic
Physics
Rapid-solidification
Surfaces and interfaces
thin films and whiskers (structure and nonelectronic properties)
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Summary:The Ni–33Al–28Cr–6Mo eutectic alloy doped with trace Dy was prepared by conventionally casting and injection casting techniques. Microstructure examination revealed that with the addition of Dy, the Ni 5Dy phase precipitated along the NiAl and Cr(Mo) phases interface in the intercellular region. Compared with the conventional-cast alloy, the microstructure of injection-cast alloy got well optimized, which was characterized by the thin interlamellar spacing, high proportion of eutectic cell area and fine homogeneous distributed Ni 5Dy phase. Furthermore, the mechanical tests showed that the room temperature mechanical properties of the injection casting alloy improve significantly.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2008.07.109