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

Gaumé, M.; Baldo, P. M.; Mompiou, Frédéric; Onimus, F.

doi:10.1016/j.scriptamat.2018.05.030

Cited by 31 publications

(14 citation statements)

References 30 publications

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“…When following on the frame sequence the endpoints of dislocations, straight lines can be drawn suggesting that, during jumps, the motion occurs by glide. This resembles the pinning-unpinning motion under irradiation observed by Gaumé et al [23]. Films showing this sequence along with other sequences are provided as Supplementary Data (Video 2 and 3).…”

Section: Further Irradiation Stepssupporting

confidence: 71%

“…All the experiments were carried out at room temperature. The methodology is similar to the one conducted by Gaumé et al [23]. First, the crosshead is displaced until the first dislocation motion occurs in the area of observation.…”

Section: In-situ Tem Loadingmentioning

confidence: 99%

“…A new methodology was developed by Gaumé et al [23] for in-situ deformation experiments inside a TEM under krypton ion irradiation to study high stress irradiation creep on a recrystallized zirconium alloy at room temperature and at 450°C. The authors observed that, at high stresses, irradiation induces the release and glide of dislocations pinned on irradiation defects.…”

Section: Introductionmentioning

confidence: 99%

“…The authors observed that, at high stresses, irradiation induces the release and glide of dislocations pinned on irradiation defects. The objective of the present work is to conduct in-situ TEM irradiation experiments on pure copper to provide quantitative data on dislocation dynamics, to determine if the conclusions of Gaumé et al [23] also apply to copper, and to critically assess the existing models. Copper is often considered as a model material for metals with FCC crystal structure such as austenitic steels, thus motivating this choice.…”

Section: Introductionmentioning

confidence: 99%

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In-situ TEM irradiation creep experiment revealing radiation induced dislocation glide in pure copper

et al. 2021

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In-situ straining experiments were performed on pure copper to investigate dislocation motion under heavy ion irradiation at high stress levels. The unpinning of dislocations from irradiation defects followed by glide was observed under irradiation at stress level just below the critical stress for dislocation glide without irradiation. This phenomenon was unraveled for the first time in copper. The dislocation dynamics recorded in-situ was statistically analyzed using digital image processing to determine the pinning lifetime. Quantitative analysis of pinning lifetimes have been performed, suggesting that a cascade related mechanism is operative to explain the fast dislocation glide under irradiation. This work provides a new insight on the irradiation creep deformation at high stress level.

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Section: Further Irradiation Stepssupporting

confidence: 71%

Section: In-situ Tem Loadingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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In-situ TEM irradiation creep experiment revealing radiation induced dislocation glide in pure copper

et al. 2021

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“…When metal is hardened by ion irradiation, it becomes more brittle. Therefore, some components, such as springs and fasteners, could break, causing damage to larger parts if not replaced [5,6]. Irradiation-assisted stress corrosion cracking is also a concerning problem [7,8,9].…”

Section: Introductionmentioning

confidence: 99%

Proton Irradiation Effects on Hardness and the Volta Potential of Welding 308L Duplex Stainless Steel

et al. 2018

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308L welding duplex stainless steel has been irradiated at 360 °C with 2 MeV protons, corresponding to a dose of 3 dpa at the maximum depth of 20 μm. Microhardness of the δ-ferrite and austenite phases was studied before and after proton irradiation using in situ nanomechanical test system (ISNTS). The locations of the phases for indentations placement were obtained by scanning probe microscopy from the ISNTS. The hardness of the δ-ferrite had a close relationship with the vacancy distribution obtained from the Stopping and Range of Ions in Matter (SRIM) Monte Carlo simulation code. However, the hardness of the austenite phase in the maximum damage region (17–20 μm depth) from the SRIM simulation was decreasing sharply, and a hardness transition region (>20 μm and <55 μm depth) was found between the maximum damage region (17–20 μm depth) and the unirradiated region (>20 μm depth). However, the δ-ferrite hardness behavior was different. A hardness of the two phases increased on the irradiated surface and the interior due to different hardening mechanisms in the austenite and δ-ferrite phases after a long time high-temperature irradiation. A transition region (>20 μm and <55 μm depth) of the Volta potential was also found, which was caused by the deeper transfer of implanted protons measured by scanning Kelvin probe force microscopy.

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Effect of 165-keV Ar-ion irradiation on microstructural and mechanical properties of zircaloy-4

Naceri

Izerrouken

Sari

et al. 2020

J Radioanal Nucl Chem

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

Cited by 31 publications

References 30 publications

In-situ TEM irradiation creep experiment revealing radiation induced dislocation glide in pure copper

In-situ TEM irradiation creep experiment revealing radiation induced dislocation glide in pure copper

Proton Irradiation Effects on Hardness and the Volta Potential of Welding 308L Duplex Stainless Steel

Effect of 165-keV Ar-ion irradiation on microstructural and mechanical properties of zircaloy-4

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