Abstract
Investigating creep crack growth under extreme environmental conditions is a challenging yet essential undertaking for the assessment of structural lifetimes of critical components subjected to extreme working conditions for long periods of time. For example, there is currently a need to evaluate structural materials for Next Generation Nuclear Plants (NGNPs) which will operate very high temperature helium-cooled reactors (VHTRs) for generating electricity and co-generating hydrogen using the process heat from the reactor. The primary helium coolant is expected to operate at temperatures at or above 750 °C. In order to evaluate candidate materials for the intermediate heat exchangers, such as Inconel 617 and Alloy 800H, we have developed a creep crack growth (CCG) test apparatus which was designed to test compact tension specimens at temperatures up to 850 °C in controlled environments, including impure helium environments, following ASTM standard E 1457–07. Details of the design of the CCG apparatus will be discussed.
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Acknowledgements
The authors wish to thank Jacob Jelinek and Paul Roman for mass-spectroscopy assistance, and Dr. Shiluo Yan for assistance with electrical measurements. This research was performed using funding received from the U.S. Department of Energy Office of Nuclear Energy’s Nuclear Energy University Programs under Battelle Energy Alliance, LLC Standard Research Contract No. 00088925, entitled “Assessment of Embrittlement of Very High Temperature Reactor Structural Alloys in Impure Helium Environments,” to the University of Wisconsin, under Prime Contract No. DE-AC07-05ID14517.
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© 2014 The Society for Experimental Mechanics
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Grierson, D. et al. (2014). An Apparatus for Creep Crack Growth Testing in Controlled Environments at High Temperatures. In: Jay, C. (eds) Fracture and Fatigue, Volume 7. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, Cham. https://doi.org/10.1007/978-3-319-00765-6_10
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DOI: https://doi.org/10.1007/978-3-319-00765-6_10
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