A continuum crystal plasticity model is used to simulate the material behavior of a directionally solidified Ni-base superalloy, DS GTD-111, in the longitudinal and transverse orientations. Isothermal uniaxial fatigue tests with hold times and creep tests are conducted at temperatures ranging from room temperature (RT) to to characterize the deformation response. The constitutive model is implemented as a User MATerial subroutine (UMAT) in ABAQUS (2003, Hibbitt, Karlsson, and Sorensen, Inc., Providence, RI, v6.3) and a parameter estimation scheme is developed to obtain the material constants. Both in-phase and out-of-phase thermo-mechanical fatigue tests are conducted. A physically based model is developed for correlating crack initiation life based on the experimental life data and predictions are made using the crack initiation model.
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e-mail: rick.neu@me.gatech.edu
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July 2005
Research Papers
Thermomechanical Fatigue Behavior of a Directionally Solidified Ni-Base Superalloy
M. M. Shenoy,
M. M. Shenoy
The George W. Woodruff School of Mechanical Engineering,
Georgia Institute of Technology
, Atlanta, GA 30332-0405
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A. P. Gordon,
A. P. Gordon
The George W. Woodruff School of Mechanical Engineering,
Georgia Institute of Technology
, Atlanta, GA 30332-0405
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D. L. McDowell,
D. L. McDowell
The George W. Woodruff School of Mechanical Engineering,
Georgia Institute of Technology
, Atlanta, GA 30332-0405
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R. W. Neu
R. W. Neu
The George W. Woodruff School of Mechanical Engineering,
e-mail: rick.neu@me.gatech.edu
Georgia Institute of Technology
, Atlanta, GA 30332-0405
Search for other works by this author on:
M. M. Shenoy
The George W. Woodruff School of Mechanical Engineering,
Georgia Institute of Technology
, Atlanta, GA 30332-0405
A. P. Gordon
The George W. Woodruff School of Mechanical Engineering,
Georgia Institute of Technology
, Atlanta, GA 30332-0405
D. L. McDowell
The George W. Woodruff School of Mechanical Engineering,
Georgia Institute of Technology
, Atlanta, GA 30332-0405
R. W. Neu
The George W. Woodruff School of Mechanical Engineering,
Georgia Institute of Technology
, Atlanta, GA 30332-0405e-mail: rick.neu@me.gatech.edu
J. Eng. Mater. Technol. Jul 2005, 127(3): 325-336 (12 pages)
Published Online: February 2, 2005
Article history
Received:
October 5, 2004
Revised:
February 2, 2005
Citation
Shenoy, M. M., Gordon, A. P., McDowell, D. L., and Neu, R. W. (February 2, 2005). "Thermomechanical Fatigue Behavior of a Directionally Solidified Ni-Base Superalloy." ASME. J. Eng. Mater. Technol. July 2005; 127(3): 325–336. https://doi.org/10.1115/1.1924560
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