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A study of microstructure and ductility of directionally solidified Ni50Al20Fe30

Published online by Cambridge University Press:  31 January 2011

J. Chen ,
J. H. Lee ,
Y. T. Lee ,
Q. Zheng ,
Y. Yu ,
Y. A. Li ,
Y. J. Tang  and
Z. Q. Hu
J. Chen
Affiliation:
High Temperature Materials Laboratory, Korea Institute of Machinery & Materials, 66 Sangnam Dong, Changwon, Kyungnam, 641-010, South Korea
J. H. Lee
Affiliation:
High Temperature Materials Laboratory, Korea Institute of Machinery & Materials, 66 Sangnam Dong, Changwon, Kyungnam, 641-010, South Korea
Y. T. Lee
Affiliation:
High Temperature Materials Laboratory, Korea Institute of Machinery & Materials, 66 Sangnam Dong, Changwon, Kyungnam, 641-010, South Korea
Q. Zheng
Affiliation:
Institute of Metal Research, Academia Sinica, 72 Wenhua Road, Shenyang, 110015 People's Republic of China
Y. Yu
Affiliation:
Institute of Metal Research, Academia Sinica, 72 Wenhua Road, Shenyang, 110015 People's Republic of China
Y. A. Li
Affiliation:
Institute of Metal Research, Academia Sinica, 72 Wenhua Road, Shenyang, 110015 People's Republic of China
Y. J. Tang
Affiliation:
Institute of Metal Research, Academia Sinica, 72 Wenhua Road, Shenyang, 110015 People's Republic of China
Z. Q. Hu
Affiliation:
Institute of Metal Research, Academia Sinica, 72 Wenhua Road, Shenyang, 110015 People's Republic of China
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Extract

The microstructure and ductility of directionally solidified Ni50Al20Fe30 were studied. Calculation and experiment show that the elastic modulus of the sample with completely eutectic lamellar structure is higher than that of the sample with dendritic structure. During deformation, in the samples with dendritic structure, some load is transferred from the proeutectic area to the γ-rich eutectic area and enhances the ductility of the sample.The existence of thick interdendritic γ phase and thick lamellar γ phase in the eutectic area of the dendritic sample is very effective in suppressing the microcrack propagation and also contributes to the ductility enhancement.

Type
Articles
Information
Journal of Materials Research , Volume 13 , Issue 2 , February 1998 , pp. 245 - 248
Copyright
Copyright © Materials Research Society 1998

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References

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