Dramatic reduction of void swelling by helium in ion-irradiated high purity α-iron

Bhattacharya, Arunodaya; Meslin, Estelle; Henry, Jean; Decamps, Brigitte; Barbu, Alain

doi:10.1080/21663831.2018.1462266

Dramatic reduction of void swelling by helium in ion-irradiated high purity α-iron

Journal Article · Wed Apr 11 00:00:00 EDT 2018 · Materials Research Letters

DOI:https://doi.org/10.1080/21663831.2018.1462266· OSTI ID:1439955

^[1]; Meslin, Estelle ^[2]; Henry, Jean ^[2]; Decamps, Brigitte ^[3]; Barbu, Alain ^[2]

Univ. Paris-Saclay, Gif-sur-Yvette (France); Univ. Paris-Saclay, Orsay (France); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Univ. Paris-Saclay, Gif-sur-Yvette (France)
Univ. Paris-Saclay, Orsay (France)

Effect of helium on void swelling was studied in high-purity α-iron, irradiated using energetic self-ions to 157 displacements per atom (dpa) at 773 K, with and without helium co-implantation up to 17 atomic parts-per-million (appm) He/dpa. Helium is known to enhance cavity formation in metals in irradiation environments, leading to early void swelling onset. In this study, microstructure characterization by transmission electron microscopy revealed compelling evidence of dramatic swelling reduction by helium co-implantation, achieved primarily by cavity size reduction. In conclusion, a comprehensive understanding of helium induced cavity microstructure development is discussed using sink strength ratios of dislocations and cavities.

View Accepted Manuscript (DOE)

Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1439955

Alternate ID(s):: OSTI ID: 23044056

Journal Information:: Materials Research Letters, Journal Name: Materials Research Letters Journal Issue: 7 Vol. 6; ISSN 2166-3831

Publisher:: Taylor and FrancisCopyright Statement

Country of Publication:: United States

Language:: English

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Effect of Helium on Dispersoid Evolution under Self-Ion Irradiation in A Dual-Phase 12Cr Oxide-Dispersion-Strengthened Alloy Kim, Hyosim; Wang, Tianyao; Gigax, Jonathan G. Materials, Vol. 12, Issue 20 https://doi.org/10.3390/ma12203343	journal	October 2019

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36 MATERIALS SCIENCE
cavity nucleation
helium
iron
swelling
transmission electron microscopy (TEM)

Dramatic reduction of void swelling by helium in ion-irradiated high purity α-iron [Supplemental Data] Meslin, Estelle; Henry, Jean; Décamps, Brigitte https://doi.org/10.6084/m9.figshare.6154571 The current record is supplemented by this preprint	preprint	April 2018
Dramatic reduction of void swelling by helium in ion-irradiated high purity α-iron [Supplemental Data] Meslin, Estelle; Henry, Jean; Décamps, Brigitte https://doi.org/10.6084/m9.figshare.6154571.v1 The current record is supplemented by this preprint	preprint	April 2018

Dramatic reduction of void swelling by helium in ion-irradiated high purity α-iron

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