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Reading: Predicting Creep in Alloy 617 Pressurized Tubes Using Uniaxial Bar Test Data

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Predicting Creep in Alloy 617 Pressurized Tubes Using Uniaxial Bar Test Data

Authors:

Joseph Croteau ,

Department of Materials Science and Engineering, Boise State University, US
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Allyssa Bateman,

Department of Materials Science and Engineering, Boise State University, US
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Yudhishthir Bhetwal,

Department of Mechanical and Biomedical Engineering, Boise State University, US
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Theodora Caldwell,

Department of Materials Science and Engineering, Boise State University, US
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Justin Allen,

Department of Mechanical and Biomedical Engineering, Boise State University, US
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Elias Lindau

Department of Materials Science and Engineering, Boise State University, US
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Abstract

Alloy 617, a nickel‑based alloy, is a leading candidate for application in next‑generation nuclear plants (NGNPs). Creep, a thermally activated, time-dependent deformation process impacts the lifetime and failure of heat exchangers used at the very high operating temperatures and pressures of such plants. Current methods of testing creep are generally limited to bar specimens in uniaxial tension. In an attempt to correlate uniaxial to multiaxial creep behavior a method to test creep in a pressurized tube was developed. Test specimens were pressurized with argon up to 3.5 MPa, and heated to 950°C. Creep rates were measured as strain rates by tracking diametric changes with time. Parallel experimental and modeling efforts were used to characterize creep behavior in the pressurized tubes. The aim of this research was to use the existing body of knowledge concerning creep in Alloy 617 to develop a model to accurately predict creep in tubular components. Towards this end, a constitutive model was developed and computer simulations undertaken which were ultimately verified experimentally.

Faculty Sponsor: Dr. Rick Ubic

How to Cite: Croteau, J., Bateman, A., Bhetwal, Y., Caldwell, T., Allen, J. and Lindau, E., 2014. Predicting Creep in Alloy 617 Pressurized Tubes Using Uniaxial Bar Test Data. International Journal of Undergraduate Research and Creative Activities, 6(1), p.2. DOI: http://doi.org/10.7710/2168-0620.1026
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Published on 20 Jun 2014.
Peer Reviewed

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