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

doi:10.1016/j.scriptamat.2018.05.030

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

Full Record
Other Related Research

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.

Copy to clipboard


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

Copy to clipboard


                    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:10.1016/j.scriptamat.2018.05.030.  https://www.osti.gov/servlets/purl/1484025.

Copy to clipboard


                    
@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}

}

Copy to clipboard

Journal Article:

Free Publicly Available Full Text

Accepted Manuscript (Publisher)

Accepted Manuscript (DOE)

Publisher's Version of Record

DOI: 10.1016/j.scriptamat.2018.05.030

Other availability

Search WorldCat to find libraries that may hold this journal

Citation Metrics:

Cited by: 1 work

Citation information provided by
Web of Science

Save / Share:

Export Metadata

Save to My Library

Similar Records in DOE PAGES and OSTI.GOV collections:

Deformation mechanism study of a hot rolled Zr-2.5Nb alloy by transmission electron microscopy. II. In situ transmission electron microscopy study of deformation mechanism change of a Zr-2.5Nb alloy upon heavy ion irradiation

Journal Article Long, Fei ; Daymond, Mark R., E-mail: mark.daymond@queensu.ca ; Yao, Zhongwen ; ... - Journal of Applied Physics

The effect of heavy-ion irradiation on deformation mechanisms of a Zr-2.5Nb alloy was investigated by using the in situ transmission electron microscopy deformation technique. The gliding behavior of prismatic 〈a〉 dislocations has been dynamically observed before and after irradiation at room temperature and 300 °C. Irradiation induced loops were shown to strongly pin the gliding dislocations. Unpinning occurred while loops were incorporated into or eliminated by 〈a〉 dislocations. In the irradiated sample, loop depleted areas with a boundary parallel to the basal plane trace were found by post-mortem observation after room temperature deformation, supporting the possibility of basal channel formation inmore »« less
DOI: 10.1063/1.4913614
Deformation mechanism study of a hot rolled Zr-2.5Nb alloy by transmission electron microscopy. II. In situ transmission electron microscopy study of deformation mechanism change of a Zr-2.5Nb alloy upon heavy ion irradiation

Journal Article Long, Fei ; Daymond, Mark R. ; Yao, Zhongwen ; ... - Journal of Applied Physics

The effect of heavy-ion irradiation on deformation mechanisms of a Zr-2.5Nb alloy was investigated by using the in situ transmission electron microscopy deformation technique. The gliding behavior of prismatic < a > dislocations has been dynamically observed before and after irradiation at room temperature and 300 degrees C. Irradiation induced loops were shown to strongly pin the gliding dislocations. Unpinning occurred while loops were incorporated into or eliminated by < a > dislocations. In the irradiated sample, loop depleted areas with a boundary parallel to the basal plane trace were found by post-mortem observation after room temperature deformation, supporting themore »« less
Cited by 7
DOI: 10.1063/1.4913614

Full Text Available
On The Creep Behavior Of Niobium-Modified Zirconium Alloys

Conference Charit, I ; Murty, K L

Zr alloys remain the main cladding materials in most water reactors. Historically, a series of Zircaloys were developed, and two versions, Zircaloy-2 and -4, are still employed in many reactors. The recent trend is to use the Nb-modified zirconium alloys where it has been shown that Nb addition improves cladding performance in various ways, most significant being superior long-term corrosion resistance. Hence, new alloys with Nb additions have recently been developed, such as Zirlo{sup TM(i)} and M5TM{sup (ii)}. Although it is known that creep properties improve, there have been very few data available to precisely evaluate the creep characteristics ofmore »« less
Mechanical Behavior of UO ₂ at Sub-grain Length Scales: Quantification of Elastic, Plastic and Creep Properties via Microscale Testing

Technical Report Shaffer, B. ; Roney, K. ; Gong, B. ; ...

Techniques were developed to measure properties at sub-grain scales using depleted Uranium Oxide (d-UO2) samples heat-treated to obtain different grain sizes and oxygen stoichiometries, through three main tasks: 1) sample processing and characterization, 2) microscale and conventional testing and 3) modeling. Grain size and crystallography were characterized using Scanning Electron Microscopy (SEM), in conjunction with Electron Backscattering Diffraction (EBSD) and Electron Channeling Contrast Imaging (ECCI). Grains were then carefully selected based on their crystallographic orientations to perform ex-situ micromechanical tests with samples machined via Focused Ion Beam (FIB), with emphasis on micro-cantilever bending. These experiments were performed under controlled atmospheres,more »« less
DOI: 10.2172/1433510

Full Text Available
Multi Resolution In-Situ Testing and Multiscale Simulation for Creep Fatigue Damage Analysis of Alloy 617

Technical Report Liu, Yongming ; Oskay, Caglar

This report outlines the research activities that were carried out for the integrated experimental and simulation investigation of creep-fatigue damage mechanism and life prediction of Nickel-based alloy, Inconel 617 at high temperatures (950° and 850°). First, a novel experimental design using a hybrid control technique is proposed. The newly developed experimental technique can generate different combinations of creep and fatigue damage by changing the experimental design parameters. Next, detailed imaging analysis and statistical data analysis are performed to quantify the failure mechanisms of the creep fatigue of alloy 617 at high temperatures. It is observed that the creep damage ismore »« less
DOI: 10.2172/1358190

Full Text Available

Similar Records