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Fatigue-induced phase formation and its deformation behavior in a cobalt-based superalloy

Published online by Cambridge University Press:  01 March 2012

M. L. Benson ,
T. A. Saleh ,
P. K. Liaw ,
H. Choo ,
D. W. Brown ,
M. R. Daymond ,
X. -L. Wang ,
A. D. Stoica ,
R. A. Buchanan  and
D. L. Klarstrom
M. L. Benson*
Affiliation:
Department of Materials Science and Engineering, The University of Tennessee, Knoxville, Tennessee 37996
T. A. Saleh
Affiliation:
Department of Materials Science and Engineering, The University of Tennessee, Knoxville, Tennessee 37996
P. K. Liaw
Affiliation:
Department of Materials Science and Engineering, The University of Tennessee, Knoxville, Tennessee 37996
H. Choo
Affiliation:
Department of Materials Science and Engineering, The University of Tennessee, Knoxville, Tennessee 37996 and Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
D. W. Brown
Affiliation:
Los Alamos Neutron Science Center, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
M. R. Daymond
Affiliation:
Department of Mechanical and Materials Engineering, Queen’s University, Kingston, Ontario K7L3N6, Canada
X. -L. Wang
Affiliation:
Spallation Neutron Source, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
A. D. Stoica
Affiliation:
Spallation Neutron Source, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
R. A. Buchanan
Affiliation:
Department of Materials Science and Engineering, The University of Tennessee, Knoxville, Tennessee 37996
D. L. Klarstrom
Affiliation:
Haynes International, Inc., Kokomo, Indiana 46904
*
a)Electronic mail: mbenson2@utk.edu
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Abstract

The low-cycle fatigue behavior of a cobalt-based superalloy was studied in situ using neutron–diffraction experiments. The alloy exhibited stress-induced formation of a hexagonal-close-packed (hcp) phase within its parent face-centered-cubic (fcc) phase at ambient temperature under strain-controlled fatigue conditions with a total strain range, Δε=2.5%. The (101) hcp peak was first observed during the 12th fatigue cycle under the given conditions following a period during which no hcp phase was detected. Subsequently, the intensity of the hcp peaks increased as fatigue progressed. Furthermore, within a single fatigue cycle, the intensity of the (101) hcp peak decreased during the compression half-cycle and increased again when the specimen was subjected to a subsequent tensile strain. The result suggests that the fcc to hcp transformation is partially reversible within one fatigue cycle.

Type
Strain/Stress Analysis
Information
Powder Diffraction , Volume 20 , Issue 2 , June 2005 , pp. 121 - 124
Copyright
Copyright © Cambridge University Press 2005

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References

ASM Handbook. (1997). (ASM International, Materials Park, OH), Vol. 19, p. 86.Google Scholar
Benson, M., Saleh, T. A., Liaw, P. K., Choo, H., Brown, D. W., Daymond, M. R., Wang, X.-L., Stoica, A. D., Buchanan, R. A., and Klarstrom, D. L. (2004). American Conference on Neutron Science, June 6-10, College Park, MD.Google Scholar
Binary Alloy Phase Diagrams. (1986). (ASM International, Materials Park, OH), Vol. 1, p. 759.Google Scholar
Brown, D., Bourke, M., Dunn, P., Field, R., Stout, M., and Thoma, D.. (2001). Metall. Mater. Trans. A MMTAEB 32, 2219–2228.Google Scholar
Dieter, G. E. (1986). Mechanical Metallurgy, 3rd ed. (McGraw-Hill, New York), pp. 135–136.Google Scholar
Farhangai, H., Armstrong, R. W., and Regnault, W. F. (1989). Mater. Sci. Eng., A MSAPE3 114, 35–38.Google Scholar
Jiang, L., Brooks, C. R., Liaw, P. K., Wang, H., Rawn, C. J., and Klarstrom, D. L. (2001). Mater. Sci. Eng., A MSAPE3 314, 162–175.CrossRefGoogle Scholar
Jiang, L., Brooks, C. R., Liaw, P. K., Klarstrom, D. L., Rawn, C. J., and Muenchen, B. (2001). Mater. Sci. Eng., A MSAPE3 316, 66–79.CrossRefGoogle Scholar
Jiang, L., Wang, H., Liaw, P. K., Brooks, C. R., and Klarstrom, D. L. (2001). Metall. Mater. Trans. A MMTAEB 32, 2279–2296.CrossRefGoogle Scholar
Jiang, L., Brooks, C. R., Liaw, P. K., Dunlap, J., Rawn, C. J., Peasoe, R. A., and Klarstrom, D. L. (2004). Metall. Mater. Trans. A MMTAEB 35, 785–796.Google Scholar
Jiang, L., Wang, H., Liaw, P. K., Brooks, C. R., and Klarstrom, D. L. (2004). Mech. Mater. MSMSD3 36, 73–84.Google Scholar
Tawancy, H. M., Iswar, V. R., and Lewis, B. E. (1986). J. Mater. Sci. Lett. JMSLD5 5, 337–341.CrossRefGoogle Scholar
www.haynesintl.comGoogle Scholar
www.isis.rl.ac.uk/engineerng/Google Scholar