High temperature multiaxial creep-fatigue and creep-ratcheting behavior of alloy 617

Shahriar Quayyum, Mainak Sengupta, Gloria Choi, Clifford J. Lissenden, Tasnim Hassan

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

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°C and 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, stress and strain space 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. A unified constitutive model (UCM) based on the Chaboche framework is developed and validated against the multiaxial experimental responses. UCM simulated responses are compared against the experimental responses for determining the current state of material modeling and if modeling improvement are needed for IHX design applications.

Original languageEnglish (US)
Title of host publicationChallenges in Mechanics of Time-Dependent Materials and Processes in Conventional and Multifunctional Materials - Proceedings of the 2013 Annual Conference on Experimental and Applied Mechanics
Pages83-97
Number of pages15
DOIs
StatePublished - 2014
Event2013 Annual Conference on Experimental and Applied Mechanics - Lombard, IL, United States
Duration: Jun 3 2013Jun 5 2013

Publication series

NameConference Proceedings of the Society for Experimental Mechanics Series
Volume2
ISSN (Print)2191-5644
ISSN (Electronic)2191-5652

Other

Other2013 Annual Conference on Experimental and Applied Mechanics
CountryUnited States
CityLombard, IL
Period6/3/136/5/13

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Computational Mechanics
  • Mechanical Engineering

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