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In situ Neutron Diffraction Studies of Carbide-Matrix Interactions in HAYNES® 230® Nickel Based Superalloy

Published online by Cambridge University Press:  01 February 2011

Tarik A. Saleh
Affiliation:
Department of Materials Science and Engineering, University of Tennessee, Knoxville, TN 37996, U.S.A. Los Alamos Neutron Science Center, Los Alamos National Laboratory, Los Alamos, NM 87545, U.S.A.
Bjørn Clausen
Affiliation:
Los Alamos Neutron Science Center, Los Alamos National Laboratory, Los Alamos, NM 87545, U.S.A.
Donald W. Brown
Affiliation:
Los Alamos Neutron Science Center, Los Alamos National Laboratory, Los Alamos, NM 87545, U.S.A.
Hahn Choo
Affiliation:
Department of Materials Science and Engineering, University of Tennessee, Knoxville, TN 37996, U.S.A. Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, U.S.A.
Peter K. Liaw
Affiliation:
Department of Materials Science and Engineering, University of Tennessee, Knoxville, TN 37996, U.S.A.
Mark A. M. Bourke
Affiliation:
Los Alamos Neutron Science Center, Los Alamos National Laboratory, Los Alamos, NM 87545, U.S.A.
Sven C. Vogel
Affiliation:
Los Alamos Neutron Science Center, Los Alamos National Laboratory, Los Alamos, NM 87545, U.S.A.
Raymond A. Buchanan
Affiliation:
Department of Materials Science and Engineering, University of Tennessee, Knoxville, TN 37996, U.S.A.
Dwaine L. Klarstrom
Affiliation:
Haynes International, Inc., Kokomo, IN 46904, U.S.A.
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Abstract

HAYNES 230 is a solid solution strengthened, face centered cubic (FCC), nickelbased superalloy, with a small amount (1–5 vol. %) of semi-coherent FCC carbides. Neutron diffraction experiments were performed to study the interaction of the carbides with the matrix during tensile and compressive loading. The behavior of the elastic lattice strains during in situ loading clearly showed a tension-compression asymmetry. Although the volume percentage is small, the interaction between the carbides and the matrix had a significant effect on the load sharing. In compression, the carbides began load sharing at the macroscopic yield point, while the tension test suggests no load sharing. Debonding at the carbide-matrix interface is proposed to explain the lack of load sharing during the tensile loading based on the disparities observed between the experimental results and the finite element models.

Type
Research Article
Copyright
Copyright © Materials Research Society 2005

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References

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In situ Neutron Diffraction Studies of Carbide-Matrix Interactions in HAYNES® 230® Nickel Based Superalloy
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In situ Neutron Diffraction Studies of Carbide-Matrix Interactions in HAYNES® 230® Nickel Based Superalloy
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