Nickel based Alloy 617 is one of the leading candidate materials for intermediate heat exchanger (IHX) of the next generation nuclear plant (NGNP). The IHX is anticipated to operate at temperatures between 800–950°C, which is in the creep regime. In addition, system start-ups and shut-downs will induce low cycle fatigue (LCF) damages in the IHX components. Hence, designing IHX using Alloy 617 for NGNP construction will require a detailed understanding of the creep-fatigue and ratcheting responses. In this study, a broad set of multiaxial creep-fatigue and ratcheting experiments are performed and the results are critically evaluated. Experiments are conducted by prescribing multiaxial loading histories in axial and shear directions at 850°C and 950°C with different strain rates and strain amplitudes. Experimental results revealed that the axial strain ratcheting and cyclic hardening/softening responses of Alloy 617 vary significantly with temperature levels, strain rates and strain amplitudes indicating the dependence of creep-fatigue and ratcheting responses on these parameters. This necessitates the incorporation of strain rate and strain amplitude dependence and effect of loading non-proportionality and temperature in the unified constitutive modeling (UCM) for a better prediction of the material behavior. Development of a UCM is underway based on the experimental results developed.
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ASME 2013 Pressure Vessels and Piping Conference
July 14–18, 2013
Paris, France
Conference Sponsors:
- Pressure Vessels and Piping Division
- Nondestructive Evaluation Engineering Division
ISBN:
978-0-7918-5567-6
PROCEEDINGS PAPER
Fatigue and Ratcheting Experimental Responses of Alloy 617 Under High Temperature Multiaxial Loading
Shahriar Quayyum
,
Shahriar Quayyum
North Carolina State University, Raleigh, NC
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Mainak Sengupta
,
Mainak Sengupta
The Pennsylvania State University, University Park, PA
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Gloria Choi
,
Gloria Choi
The Pennsylvania State University, University Park, PA
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Clifford J. Lissenden
,
Clifford J. Lissenden
The Pennsylvania State University, University Park, PA
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Tasnim Hassan
Tasnim Hassan
North Carolina State University, Raleigh, NC
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Shahriar Quayyum
North Carolina State University, Raleigh, NC
Mainak Sengupta
The Pennsylvania State University, University Park, PA
Gloria Choi
The Pennsylvania State University, University Park, PA
Clifford J. Lissenden
The Pennsylvania State University, University Park, PA
Tasnim Hassan
North Carolina State University, Raleigh, NC
Paper No:
PVP2013-97252, V003T03A106; 10 pages
Published Online:
January 17, 2014
Citation
Quayyum, S, Sengupta, M, Choi, G, Lissenden, CJ, & Hassan, T. "Fatigue and Ratcheting Experimental Responses of Alloy 617 Under High Temperature Multiaxial Loading." Proceedings of the ASME 2013 Pressure Vessels and Piping Conference. Volume 3: Design and Analysis. Paris, France. July 14–18, 2013. V003T03A106. ASME. https://doi.org/10.1115/PVP2013-97252
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