Modeling microtwinning during creep in Ni-based superalloys

S. Karthikeyan; R. R. Unocic; P. M. Sarosi; G. B. Viswanathan; D. D. Whitis; M. J. Mills

doi:10.1016/j.scriptamat.2005.11.049

Modeling microtwinning during creep in Ni-based superalloys

S. Karthikeyan, R. R. Unocic, P. M. Sarosi, G. B. Viswanathan, D. D. Whitis, M. J. Mills

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75 Scopus citations

Abstract

It has been recently shown that microtwinning is the principal deformation mechanism under certain creep conditions in several polycrystalline nickel-base superalloys. A creep model based on this mechanism is developed in this paper. Model parameters, supplied by microscopy and by atomistic calculations, are used to compare the model against experiment.

Original language	English
Pages (from-to)	1157-1162
Number of pages	6
Journal	Scripta Materialia
Volume	54
Issue number	6
DOIs	https://doi.org/10.1016/j.scriptamat.2005.11.049
State	Published - Mar 2006
Externally published	Yes

Funding

The authors wish to thank NASA and the Propulsion 21 program for support of experimental aspects of the program, and the Air Force Office of Scientific Research for support of the model development through the MEANS-2 theme through grant # FA9550-05-1-0135. We are also grateful to Drs. Ju Li and Yunzhi Wang for many useful discussions.

Funders	Funder number
National Aeronautics and Space Administration
Air Force Office of Scientific Research	FA9550-05-1-0135

Keywords

Creep
Microtwinning
Modeling
Superalloys

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10.1016/j.scriptamat.2005.11.049

Cite this

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abstract = "It has been recently shown that microtwinning is the principal deformation mechanism under certain creep conditions in several polycrystalline nickel-base superalloys. A creep model based on this mechanism is developed in this paper. Model parameters, supplied by microscopy and by atomistic calculations, are used to compare the model against experiment.",

keywords = "Creep, Microtwinning, Modeling, Superalloys",

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AU - Whitis, D. D.

AU - Mills, M. J.

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AB - It has been recently shown that microtwinning is the principal deformation mechanism under certain creep conditions in several polycrystalline nickel-base superalloys. A creep model based on this mechanism is developed in this paper. Model parameters, supplied by microscopy and by atomistic calculations, are used to compare the model against experiment.

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Modeling microtwinning during creep in Ni-based superalloys

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Keywords

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