SPECIAL ISSUE CONTRIBUTION
Creep-fatigue behaviour of single-crystal Ni-base superalloy CMSX-8
Ernesto A. Estrada Rodas,
Sanam Gorgannejad,
Richard W. Neu,
Ernesto A. Estrada Rodas
The George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Georgia
Present address: Ernesto A. Estrada Rodas, Exponent, Inc, Atlanta, GA.Search for more papers by this authorSanam Gorgannejad
The George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Georgia
Search for more papers by this authorCorresponding Author
Richard W. Neu
The George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Georgia
School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia
Correspondence
Richard W. Neu, The George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA.
Email: [email protected]
Search for more papers by this authorErnesto A. Estrada Rodas,
Sanam Gorgannejad,
Richard W. Neu,
Ernesto A. Estrada Rodas
The George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Georgia
Present address: Ernesto A. Estrada Rodas, Exponent, Inc, Atlanta, GA.Search for more papers by this authorSanam Gorgannejad
The George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Georgia
Search for more papers by this authorCorresponding Author
Richard W. Neu
The George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Georgia
School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia
Correspondence
Richard W. Neu, The George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA.
Email: [email protected]
Search for more papers by this authorAbstract
The creep-fatigue behaviour of a lower cost, reduced rhenium Ni-base superalloy, CMSX-8, a variant of CMSX-4, cast in a single crystal was experimentally evaluated over a broad range of conditions, from room temperature to 1100°C, and for two loading orientations: <001> and <111>. The fatigue lives depend on the orientation, cycle type, and temperature. The relative importance of these parameters on influencing the life is identified and discussed. From this understanding, a simple life model is constructed to capture the influence of these broad test conditions. The results are compared with those of the higher Re superalloy, CMSX-4.
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