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Models for the Porosity Growth and Dissolution in Single-Crystal Nickel-Base Superalloys

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Abstract:

During the solidification and the homogenization of single-crystal nickel-base superalloys, pores form which lead to the degradation of the mechanical properties, especially the fatigue lifetime. Hot Isostatic Pressing (HIP) is used for the pores dissolution. In this paper, analytical models for the formation of the homogenization pores and their dissolution during the HIP are developed. The results are compared with experimental data.

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Periodical:

Defect and Diffusion Forum (Volumes 297-301)

Pages:

187-192

DOI:

https://doi.org/10.4028/www.scientific.net/DDF.297-301.187

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Online since:

April 2010

Authors:

Boris S. Bokstein, Vladimir Esin, Alexey Rodin, I.L. Svetlov

Keywords:

Diffusion, Nickel Alloy, Porosity, Segregation

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© 2010 Trans Tech Publications Ltd. All Rights Reserved

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