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

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

Journal Article · Wed May 30 00:00:00 EDT 2018 · Scripta Materialia

DOI:https://doi.org/10.1016/j.scriptamat.2018.05.030· OSTI ID:1484025

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

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.

View Accepted Manuscript (DOE)

Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE Office of Nuclear Energy (NE)

Grant/Contract Number:: AC02-06CH11357

OSTI ID:: 1484025

Alternate ID(s):: OSTI ID: 1582802
OSTI ID: 22813092

Journal Information:: Scripta Materialia, Journal Name: Scripta Materialia Journal Issue: C Vol. 154; ISSN 1359-6462

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Mobility of dislocations in zirconium Soyez, Thomas; Caillard, Daniel; Onimus, Fabien arXiv https://doi.org/10.48550/arxiv.2009.01918	text	January 2020

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36 MATERIALS SCIENCE
Creep
Dislocation
Irradiation
Transmission electron microscopy
Zirconium

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

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References (30)

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