In-situ observation of an irradiation creep deformation mechanism in zirconium alloys

Gaume, M.; Baldo, P.; Mompiou, F.; Onimus, F.

doi:10.1016/j.scriptamat.2018.05.030

Title: In-situ observation of an irradiation creep deformation mechanism in zirconium alloys

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Abstract

We report an original experimental study on a zirconium alloy deformed in situ under ion irradiation and applied stress inside a Transmission Electron Microscope. We observe that dislocations initially pinned on irradiation defects can be unpinned and glide at a lower stress under the effect of the irradiation. It is proposed that unpinning occurs by a local effect of the displacement cascade created by the incoming ion in the vicinity of the pinning point. This novel mechanism of dislocation glide assisted by irradiation is thought to play a crucial role on in reactor irradiation creep of zirconium alloys.

Authors:

Gaume, M. ^[1]; Baldo, P. ^[2]; Mompiou, F. ^[3]; Onimus, F. ^[1]

Univ. Paris-Saclay, Gif-sur-Yvette (France); Alternative Energies and Atomic Energy Commission (CEA), Saclay (France). DEN, Service de Recherches de Métallurgie Appliquées
Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division
Univ. de Toulouse, Toulouse (France). CEMES-CNRS

Publication Date:: 2018-05-30

Research Org.:: Argonne National Lab. (ANL), Argonne, IL (United States)

Sponsoring Org.:: USDOE Office of Nuclear Energy (NE)

OSTI Identifier:: 1484025

Alternate Identifier(s):: OSTI ID: 1582802

Grant/Contract Number:: AC02-06CH11357; AC07-051D14517

Resource Type:: Accepted Manuscript

Journal Name:: Scripta Materialia

Additional Journal Information:: Journal Volume: 154; Journal Issue: C; Journal ID: ISSN 1359-6462

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; Transmission electron microscopy; Irradiation; Creep; Zirconium; Dislocation

Citation Formats


                    Gaume, M., Baldo, P., Mompiou, F., and Onimus, F. In-situ observation of an irradiation creep deformation mechanism in zirconium alloys.  United States: N. p., 2018. 
        Web.  doi:10.1016/j.scriptamat.2018.05.030.

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                    Gaume, M., Baldo, P., Mompiou, F., & Onimus, F. In-situ observation of an irradiation creep deformation mechanism in zirconium alloys.  United States.  doi:https://doi.org/10.1016/j.scriptamat.2018.05.030

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                    Gaume, M., Baldo, P., Mompiou, F., and Onimus, F. Wed .  
        "In-situ observation of an irradiation creep deformation mechanism in zirconium alloys".  United States.  doi:https://doi.org/10.1016/j.scriptamat.2018.05.030.  https://www.osti.gov/servlets/purl/1484025.

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@article{osti_1484025,

  title        = {In-situ observation of an irradiation creep deformation mechanism in zirconium alloys},

  author       = {Gaume, M. and Baldo, P. and Mompiou, F. and Onimus, F.},

  abstractNote = {We report an original experimental study on a zirconium alloy deformed in situ under ion irradiation and applied stress inside a Transmission Electron Microscope. We observe that dislocations initially pinned on irradiation defects can be unpinned and glide at a lower stress under the effect of the irradiation. It is proposed that unpinning occurs by a local effect of the displacement cascade created by the incoming ion in the vicinity of the pinning point. This novel mechanism of dislocation glide assisted by irradiation is thought to play a crucial role on in reactor irradiation creep of zirconium alloys.},

  doi          = {10.1016/j.scriptamat.2018.05.030},

  journal      = {Scripta Materialia},

  number       = C,

  volume       = 154,

  place        = {United States},

  year         = {2018},

  month        = {5}

}

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DOI: https://doi.org/10.1016/j.scriptamat.2018.05.030

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