Cyclic deformation behavior of HAYNES® HR-120® superalloy under low-cycle fatigue loading

L. J. Chen; P. K. Liaw; H. Wang; Y. H. He; R. L. McDaniels; L. Jiang; B. Yang; D. L. Klarstrom

doi:10.1016/S0167-6636(03)00033-4

Cyclic deformation behavior of HAYNES® HR-120® superalloy under low-cycle fatigue loading

L. J. Chen, P. K. Liaw, H. Wang, Y. H. He, R. L. McDaniels, L. Jiang, B. Yang, D. L. Klarstrom

Nuclear Energy Materials Microanalysis

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Abstract

The cyclic deformation behavior of HAYNES® HR-120® superalloy at different temperatures ranging from 24 to 982 °C was investigated by performing fully reversed total strain-controlled low-cycle fatigue tests under the total strain ranges of 0.4-2.3%. It was noted that in most cases, increasing the temperature from 24 to 982 °C significantly decreased the fatigue lives. The alloy exhibited the cyclic hardening, softening, or stable cyclic stress response, which was dependent on the temperature and total strain range. Dynamic-strain aging was found to occur at both temperatures of 761 and 871 °C. The precipitation of secondary-phase particles was also observed above 761°C. The change in the microstructure due to cyclic deformation was evaluated through scanning electron microscopy and transmission electron microscopy. In addition, an advanced infrared thermography system was employed to monitor the temperature evolution during fatigue at 24 °C. It was noted that during low-cycle fatigue, the steady-state temperature of the specimens increased from 2 to 120 °C above room temperature, depending on the strain range and fatigue life. Thus, the measured temperature can be used to predict fatigue life. A model based on energy conservation and one-dimensional heat conduction was used to predict the temperature evolution resulting from low-cycle fatigue.

Original language	English
Pages (from-to)	85-98
Number of pages	14
Journal	Mechanics of Materials
Volume	36
Issue number	1-2
DOIs	https://doi.org/10.1016/S0167-6636(03)00033-4
State	Published - Jan 2004

Funding

This research is supported by the Haynes International, Inc., the National Science Foundation (NSF), the Division of Design, Manufacture, and Industrial Innovation, under grant number DHI-9724467, the NSF Combined Research-Curriculum Development (CRCD) Program under EEC-9527527, the Integrative Graduate Education and Research Training (IGERT) Program under DGE-9987548, the International Materials Institutes (IMI) Program under DHR-0231320, and by the Assistant Secretary of Energy Efficiency and Renewable Energy, Office of Transportation Technologies, as part of the High Temperature Materials Laboratory User Program at the Oak Ridge National Laboratory managed by the UT-Battelle, LLC, for the Department of Energy under contract number DE-AC05-00OR22725. The NSF contract monitors are Dr. D. Durham, Ms. M. Poats, Dr, W. Jennings, Dr. L. Goldberg, and Dr. C. Huber. We would also like to thank Mr. Gongyao Wang for his help during the preparation of this paper.

Funders	Funder number
Assistant Secretary of Energy Efficiency and Renewable Energy
Division of Design, Manufacture, and Industrial Innovation	EEC-9527527, DHI-9724467
Haynes International, Inc.
Integrative Graduate Education and Research Training	DGE-9987548
International Materials Institutes	DHR-0231320
Office of Transportation Technologies
National Science Foundation
U.S. Department of Energy	DE-AC05-00OR22725
Oak Ridge National Laboratory

Keywords

Cyclic stress response
Dynamic-strain aging
Fatigue life
Low-cycle fatigue
Model
Superalloy
Temperature
Thermography

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title = "Cyclic deformation behavior of HAYNES{\textregistered} HR-120{\textregistered} superalloy under low-cycle fatigue loading",

abstract = "The cyclic deformation behavior of HAYNES{\textregistered} HR-120{\textregistered} superalloy at different temperatures ranging from 24 to 982 °C was investigated by performing fully reversed total strain-controlled low-cycle fatigue tests under the total strain ranges of 0.4-2.3%. It was noted that in most cases, increasing the temperature from 24 to 982 °C significantly decreased the fatigue lives. The alloy exhibited the cyclic hardening, softening, or stable cyclic stress response, which was dependent on the temperature and total strain range. Dynamic-strain aging was found to occur at both temperatures of 761 and 871 °C. The precipitation of secondary-phase particles was also observed above 761°C. The change in the microstructure due to cyclic deformation was evaluated through scanning electron microscopy and transmission electron microscopy. In addition, an advanced infrared thermography system was employed to monitor the temperature evolution during fatigue at 24 °C. It was noted that during low-cycle fatigue, the steady-state temperature of the specimens increased from 2 to 120 °C above room temperature, depending on the strain range and fatigue life. Thus, the measured temperature can be used to predict fatigue life. A model based on energy conservation and one-dimensional heat conduction was used to predict the temperature evolution resulting from low-cycle fatigue.",

keywords = "Cyclic stress response, Dynamic-strain aging, Fatigue life, Low-cycle fatigue, Model, Superalloy, Temperature, Thermography",

author = "Chen, {L. J.} and Liaw, {P. K.} and H. Wang and He, {Y. H.} and McDaniels, {R. L.} and L. Jiang and B. Yang and Klarstrom, {D. L.}",

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AU - Liaw, P. K.

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AU - He, Y. H.

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AU - Yang, B.

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AB - The cyclic deformation behavior of HAYNES® HR-120® superalloy at different temperatures ranging from 24 to 982 °C was investigated by performing fully reversed total strain-controlled low-cycle fatigue tests under the total strain ranges of 0.4-2.3%. It was noted that in most cases, increasing the temperature from 24 to 982 °C significantly decreased the fatigue lives. The alloy exhibited the cyclic hardening, softening, or stable cyclic stress response, which was dependent on the temperature and total strain range. Dynamic-strain aging was found to occur at both temperatures of 761 and 871 °C. The precipitation of secondary-phase particles was also observed above 761°C. The change in the microstructure due to cyclic deformation was evaluated through scanning electron microscopy and transmission electron microscopy. In addition, an advanced infrared thermography system was employed to monitor the temperature evolution during fatigue at 24 °C. It was noted that during low-cycle fatigue, the steady-state temperature of the specimens increased from 2 to 120 °C above room temperature, depending on the strain range and fatigue life. Thus, the measured temperature can be used to predict fatigue life. A model based on energy conservation and one-dimensional heat conduction was used to predict the temperature evolution resulting from low-cycle fatigue.

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Cyclic deformation behavior of HAYNES® HR-120® superalloy under low-cycle fatigue loading

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