Mediation of high temperature radiation damage in bcc iron by Au or Cu precipitation

Shasha Zhang; Zhengjun Yao; Zhaokuan Zhang; Moliar Oleksandr; Feida Chen; Xingzhong Cao; Peng Zhang; Niels van Dijk; Sybrand van der Zwaag

doi:10.1016/j.nimb.2019.11.035

Mediation of high temperature radiation damage in bcc iron by Au or Cu precipitation

Shasha Zhang^*, Zhengjun Yao, Zhaokuan Zhang, Moliar Oleksandr, Feida Chen, Xingzhong Cao, Peng Zhang, Niels van Dijk, Sybrand van der Zwaag

^*Corresponding author for this work

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Abstract

High temperature radiation damage in binary bcc Fe alloys containing 1 atomic % Au or Cu due to Fe ion irradiation at 550 °C to a peak dose of 2.8 and 8.3 dpa is studied. The precipitation behavior of gold and copper and its correlation to the irradiation-induced defects is studied by transmission electron microscopy and variable energy positron annihilation spectroscopy (VEPAS). The increase of S parameters from VEPAS indicates the formation of open volume defects upon irradiation. Disc-shaped Au precipitates, grown from the irradiation induced dislocations, are observed in the Fe-Au alloy. In the Fe-Cu alloy, spherical Cu particles are formed but no direct connection between Cu precipitates and radiation damage is detected. For the Fe-Au alloy, the surface hardness dramatically increases for a dose of 2.8 dpa, with a slight decrease as the irradiation dose is enhanced to 8.3 dpa. In the Fe-Cu alloy, radiation hardening increases continuously.

Original language	English
Pages (from-to)	69-75
Number of pages	7
Journal	Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume	463
DOIs	https://doi.org/10.1016/j.nimb.2019.11.035
Publication status	Published - 2020

Bibliographical note

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care
Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Keywords

Au/Cu precipitation
bcc Fe
Hardening
Nanoindentation
Positron annihilation spectroscopy
Radiation damage

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Zhang, Shasha ; Yao, Zhengjun ; Zhang, Zhaokuan ; Oleksandr, Moliar ; Chen, Feida ; Cao, Xingzhong ; Zhang, Peng ; van Dijk, Niels ; van der Zwaag, Sybrand. / Mediation of high temperature radiation damage in bcc iron by Au or Cu precipitation. In: Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms. 2020 ; Vol. 463. pp. 69-75.

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abstract = "High temperature radiation damage in binary bcc Fe alloys containing 1 atomic % Au or Cu due to Fe ion irradiation at 550 °C to a peak dose of 2.8 and 8.3 dpa is studied. The precipitation behavior of gold and copper and its correlation to the irradiation-induced defects is studied by transmission electron microscopy and variable energy positron annihilation spectroscopy (VEPAS). The increase of S parameters from VEPAS indicates the formation of open volume defects upon irradiation. Disc-shaped Au precipitates, grown from the irradiation induced dislocations, are observed in the Fe-Au alloy. In the Fe-Cu alloy, spherical Cu particles are formed but no direct connection between Cu precipitates and radiation damage is detected. For the Fe-Au alloy, the surface hardness dramatically increases for a dose of 2.8 dpa, with a slight decrease as the irradiation dose is enhanced to 8.3 dpa. In the Fe-Cu alloy, radiation hardening increases continuously.",

keywords = "Au/Cu precipitation, bcc Fe, Hardening, Nanoindentation, Positron annihilation spectroscopy, Radiation damage",

author = "Shasha Zhang and Zhengjun Yao and Zhaokuan Zhang and Moliar Oleksandr and Feida Chen and Xingzhong Cao and Peng Zhang and {van Dijk}, Niels and {van der Zwaag}, Sybrand",

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Mediation of high temperature radiation damage in bcc iron by Au or Cu precipitation. / Zhang, Shasha; Yao, Zhengjun; Zhang, Zhaokuan; Oleksandr, Moliar; Chen, Feida; Cao, Xingzhong; Zhang, Peng; van Dijk, Niels ; van der Zwaag, Sybrand.

In: Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, Vol. 463, 2020, p. 69-75.

Research output: Contribution to journal › Article › Scientific › peer-review

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AU - van der Zwaag, Sybrand

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AB - High temperature radiation damage in binary bcc Fe alloys containing 1 atomic % Au or Cu due to Fe ion irradiation at 550 °C to a peak dose of 2.8 and 8.3 dpa is studied. The precipitation behavior of gold and copper and its correlation to the irradiation-induced defects is studied by transmission electron microscopy and variable energy positron annihilation spectroscopy (VEPAS). The increase of S parameters from VEPAS indicates the formation of open volume defects upon irradiation. Disc-shaped Au precipitates, grown from the irradiation induced dislocations, are observed in the Fe-Au alloy. In the Fe-Cu alloy, spherical Cu particles are formed but no direct connection between Cu precipitates and radiation damage is detected. For the Fe-Au alloy, the surface hardness dramatically increases for a dose of 2.8 dpa, with a slight decrease as the irradiation dose is enhanced to 8.3 dpa. In the Fe-Cu alloy, radiation hardening increases continuously.

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Mediation of high temperature radiation damage in bcc iron by Au or Cu precipitation

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