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Modeling of the high temperature behaviour of IN792 in gas turbine hot parts
Linköping University, The Institute of Technology. Linköping University, Department of Mechanical Engineering, Solid Mechanics.
Linköping University, The Institute of Technology. Linköping University, Department of Mechanical Engineering.
Linköping University, The Institute of Technology. Linköping University, Department of Mechanical Engineering, Solid Mechanics.
2002 (English)In: Computational materials science, ISSN 0927-0256, Vol. 25, no 3, 305-315 p.Article in journal (Other academic) Published
Abstract [en]

The material parameters for two isothermal viscoplastic models with deliberately limited sets of material parameters have been estimated. The models are to describe the behaviour of the nickel based superalloy IN792 in a gas turbine hot part application. The models are based on a power law flow equation and the state variable used is backstress. The model calibration is done by least-squares optimization using non-standard constitutive tests that are aimed at describing relevant component conditions. The constitutive tests give information about the kinematic hardening effects for the backstress evolution equations, while secondary creep data provides stress versus inelastic strain rate information for the flow equation. All tests are uniaxial and isothermal. With the estimated parameter sets the models give relatively good fits to the data. The results suggest that the models can be used to describe the high temperature behaviour of IN792. ⌐ 2002 Elsevier Science B.V. All rights reserved.

Place, publisher, year, edition, pages
2002. Vol. 25, no 3, 305-315 p.
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Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-35568DOI: 10.1016/S0927-0256(02)00219-7Local ID: 27647OAI: oai:DiVA.org:liu-35568DiVA: diva2:256416
Available from: 2009-10-10 Created: 2009-10-10 Last updated: 2011-01-13

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Almroth, PerSjöström, Karl Henning SörenSimonsson, Kjell

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Almroth, PerSjöström, Karl Henning SörenSimonsson, Kjell
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The Institute of TechnologySolid MechanicsDepartment of Mechanical Engineering
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