Temperature evolution during low-cycle fatigue of ULTIMET® alloy: Experiment and modeling

L. Jiang, H. Wang, P. K. Liaw, C. R. Brooks, D. L. Klarstrom

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46 Scopus citations

Abstract

The temperature variations of a cobalt-based ULTIMET alloy subjected to low-cycle fatigue were characterized by a high-speed, high-resolution infrared thermography. The change of temperature during fatigue, which was due to the thermal-elastic-plastic effect, was utilized to reveal the accumulation of fatigue damage. A constitutive model was developed for predicting the thermal and mechanical responses of ULTIMET alloy subjected to cyclic deformation. The model was constructed in light of internal state variables, which were developed to characterize the inelastic strain of the material during cyclic loading. The predicted stress-strain and temperature responses were found to be in good agreement with the experimental results.

Original languageEnglish
Pages (from-to)73-84
Number of pages12
JournalMechanics of Materials
Volume36
Issue number1-2
DOIs
StatePublished - Jan 2004

Funding

Haynes International Inc. provided the major funding for this research project. We gratefully acknowledge the financial support of the National Science Foundation (NSF), the Division of Design, Manufacture, and Industrial Innovation, under Grant No. DMI-9724476, the Combined Research-Curriculum Development (CRCD) Program, under EEC-9527527, and EEC-0203415, the Integrative Graduate Education and Research Training (IGERT) Program, under DGE-9987548, and the International Materials Institute (IMI) Program, under DHR-0231320 granted to the University of Tennessee (UT), Knoxville, with Dr. D. Durham, Ms. M. Poats, Dr. W. Jennings, Dr. L. Goldberg, and Dr. C. Huber as the contract monitors. This research was also financially made possible by the US Department of Energy, Assistant Secretary for Energy Efficiency and Renewable Energy, Office of Transportation Technologies, as part of the High Temperature Materials Laboratory (HTML) User Program under contract DE-AC05-96OR22464, managed by UT-Battelle LLC. In addition, appreciation goes to the financial support of the Center for Materials Processing and Office of Research Administration at UT, and the Southeastern Universities Research Association (SURA) with Dr. C. McHargue, Dr. K. Walker, and Dr. T. Hutchinson as directors. We are very grateful for the interactions with our colleagues, Mr. B. Yang, Dr. M. Kehani, Dr. R. Dinwiddie, Dr. C.R. Hubbard, and Dr. A.R. Pasto. Many thanks are due to Mr. D. E. Fielden, Mr. G. Jones, and Mr. L. A. Smith at the University of Tennessee for their great help in setting up the electrohydraulic machines and excellent technical support, and Mr. R. Stooksbury and Mr. F. Holiway for supplies.

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