Fatigue-induced Reversible/Irreversible Structural-transformation Study of a Ni-based Superalloy Using Combined In-situ Neutron-Diffraction and Thermal Approaches

Huang, E-Wen; Barabash, Rozaliya; Clausen, Bjorn; Liu, Yee-Lang; Kai, Ji-Jung; Ice, Gene E; Woods, Kyle P.; Liaw, Peter K

doi:10.1016/j.ijplas.2010.01.003

Title: Fatigue-induced Reversible/Irreversible Structural-transformation Study of a Ni-based Superalloy Using Combined In-situ Neutron-Diffraction and Thermal Approaches

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Abstract

Cyclic loading and the subsequent fatigue damage have been investigated with the in-situ neutron-diffraction and thermal characterization for a single-phase, polycrystal nickel-based alloy. The lattice-strain evolution is compared with the bulk parameters, such as the applied stress and the thermal response as a function of the fatigue cycles. The in-situ neutron-diffraction and thermal-evolution results identify the development of the five fatigue-damage stages. Fatigue damage is observed with bulk hardening, softening, and eventual saturation evident in both the diffraction patterns and the thermal-evolution features. An increase in the dislocation density and the formation of the patterned-dislocation structure are responsible for hardening within the early cycles. With further cyclic loading, the rearrangements of the dislocations result in the cyclic softening. The transition to saturation cycles is characterized by the anisotropy of the lattice strain evolution. The nonmonotonic thermal response and the irreversible anisotropy of the lattice-strain evolution are observed in the final saturation fatigue cycles. The fatigue-damage microstructure and dislocation-substructure evolution are studied with diffraction-profile analyses and complemented by the transmission-electron microscopy. The fluctuations of the differential dislocation density and size of the patterned substructure along with the in-situ thermal measurements reveal a second-order-kind structural transition and indicate the development of themore »« less

Authors:

Huang, E-Wen ^[1]; Barabash, Rozaliya ^[1]; Clausen, Bjorn ^[1]; Liu, Yee-Lang ^[2]; Kai, Ji-Jung ^[2]; Ice, Gene E ^[1]; Woods, Kyle P. ^[3]; Liaw, Peter K ^[3]

ORNL
National Tsing Hua University, Taiwan
University of Tennessee, Knoxville (UTK)

Publication Date:: Fri Jan 01 00:00:00 EST 2010

Research Org.:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Org.:: USDOE Office of Science (SC)

OSTI Identifier:: 984378

DOE Contract Number:: DE-AC05-00OR22725

Resource Type:: Journal Article

Journal Name:: International Journal of Plasticity

Additional Journal Information:: Journal Volume: 26; Journal Issue: 8; Journal ID: ISSN 0749-6419

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; ANISOTROPY; DIFFRACTION; DISLOCATIONS; FLUCTUATIONS; HARDENING; HEAT RESISTING ALLOYS; MICROSCOPY; MICROSTRUCTURE; NEUTRON DIFFRACTION; POLYCRYSTALS; SATURATION; STRAINS

Citation Formats


                    Huang, E-Wen, Barabash, Rozaliya, Clausen, Bjorn, Liu, Yee-Lang, Kai, Ji-Jung, Ice, Gene E, Woods, Kyle P., and Liaw, Peter K. Fatigue-induced Reversible/Irreversible Structural-transformation Study of a Ni-based Superalloy Using Combined In-situ Neutron-Diffraction and Thermal Approaches.  United States: N. p., 2010. 
        Web.  doi:10.1016/j.ijplas.2010.01.003.

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                    Huang, E-Wen, Barabash, Rozaliya, Clausen, Bjorn, Liu, Yee-Lang, Kai, Ji-Jung, Ice, Gene E, Woods, Kyle P., & Liaw, Peter K. Fatigue-induced Reversible/Irreversible Structural-transformation Study of a Ni-based Superalloy Using Combined In-situ Neutron-Diffraction and Thermal Approaches.  United States.  https://doi.org/10.1016/j.ijplas.2010.01.003

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                    Huang, E-Wen, Barabash, Rozaliya, Clausen, Bjorn, Liu, Yee-Lang, Kai, Ji-Jung, Ice, Gene E, Woods, Kyle P., and Liaw, Peter K. 2010.  
        "Fatigue-induced Reversible/Irreversible Structural-transformation Study of a Ni-based Superalloy Using Combined In-situ Neutron-Diffraction and Thermal Approaches".  United States.  https://doi.org/10.1016/j.ijplas.2010.01.003.

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@article{osti_984378,

  title        = {Fatigue-induced Reversible/Irreversible Structural-transformation Study of a Ni-based Superalloy Using Combined In-situ Neutron-Diffraction and Thermal Approaches},

  author       = {Huang, E-Wen and Barabash, Rozaliya and Clausen, Bjorn and Liu, Yee-Lang and Kai, Ji-Jung and Ice, Gene E and Woods, Kyle P. and Liaw, Peter K},

  abstractNote = {Cyclic loading and the subsequent fatigue damage have been investigated with the in-situ neutron-diffraction and thermal characterization for a single-phase, polycrystal nickel-based alloy. The lattice-strain evolution is compared with the bulk parameters, such as the applied stress and the thermal response as a function of the fatigue cycles. The in-situ neutron-diffraction and thermal-evolution results identify the development of the five fatigue-damage stages. Fatigue damage is observed with bulk hardening, softening, and eventual saturation evident in both the diffraction patterns and the thermal-evolution features. An increase in the dislocation density and the formation of the patterned-dislocation structure are responsible for hardening within the early cycles. With further cyclic loading, the rearrangements of the dislocations result in the cyclic softening. The transition to saturation cycles is characterized by the anisotropy of the lattice strain evolution. The nonmonotonic thermal response and the irreversible anisotropy of the lattice-strain evolution are observed in the final saturation fatigue cycles. The fatigue-damage microstructure and dislocation-substructure evolution are studied with diffraction-profile analyses and complemented by the transmission-electron microscopy. The fluctuations of the differential dislocation density and size of the patterned substructure along with the in-situ thermal measurements reveal a second-order-kind structural transition and indicate the development of the irreversible fatigue-induced microstructure.},

  doi          = {10.1016/j.ijplas.2010.01.003},

  url          = {https://www.osti.gov/biblio/984378},
  journal      = {International Journal of Plasticity},

  issn         = {0749-6419},

  number       = 8,

  volume       = 26,

  place        = {United States},

  year         = {Fri Jan 01 00:00:00 EST 2010},

  month        = {Fri Jan 01 00:00:00 EST 2010}

}

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