Elastic moduli and load partitioning in a single-crystal nickel superalloy

The constrained moduli of the γ and γ′ phases of the Ni superalloy CMSX-4 have been determined using in situ neutron diffraction. The elastic moduli of the isolated phases fitted using a model are found to be E [ 100 ] = 103 GPa in the γ and 134 GPa in the γ′ at room temperature, while at 900 °C the...

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Bibliographic Details
Published in:Scripta materialia 2009-07, Vol.61 (2), p.109-112
Main Authors: Dye, D., Coakley, J., Vorontsov, V.A., Stone, H.J., Rogge, R.B.
Format: Article
Language:English
Subjects:
Elastic behaviour
Neutron diffraction
Nickel alloys
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Summary:The constrained moduli of the γ and γ′ phases of the Ni superalloy CMSX-4 have been determined using in situ neutron diffraction. The elastic moduli of the isolated phases fitted using a model are found to be E [ 100 ] = 103 GPa in the γ and 134 GPa in the γ′ at room temperature, while at 900 °C they are 96 and 90 GPa. Therefore load partitions markedly to the γ′ phase at room temperature but there is little load partitioning at elevated temperatures.
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2009.03.008