Microstructural evolution in pure and ZrC strengthened tungsten under ion irradiation at 600°C

Wouter Van Renterghem; Dmitry Terentyev; Shanmugam Balaji; Christopher David; Andrii Dubinko; Chao Yin; Tao Zhang

doi:10.1016/j.jnucmat.2020.152710

Microstructural evolution in pure and ZrC strengthened tungsten under ion irradiation at 600°C

Wouter Van Renterghem, Dmitry Terentyev, Shanmugam Balaji, Christopher David, Andrii Dubinko, Chao Yin, Tao Zhang

Microstructural and Non-destructive Analysis

Research output › peer-review

Abstract

The microstructural evolution in ultra-fine grain (UFG) tungsten reinforced with ZrC particles under ion irradiation was investigated by transmission electron microscopy and compared to the effect of ion irradiation in reference ITER specification tungsten. Here, we report the evolution of the microstructure under heavy ion irradiation to mimic the neutron irradiation damage taking place in a nuclear fusion environment. The irradiation was performed with 9.1 MeV gold ions at 600°C to reach the end-of-life irradiation dose in ITER and DEMO divertor (i.e. 1 and 5 dpa). The microstructure is investigated by means of transmission electron microscopy. It is found that the ion induced defect structure does not deviate significantly from the reference tungsten. The main defects are a/2<111> type dislocation loops and nano-metric voids. The defect concentration is already saturated at 1 dpa and the higher irradiation damage was not found to have a significant effect on the defect concentration.

Original language	English
Article number	152710
Pages (from-to)	1-9
Number of pages	9
Journal	Journal of Nuclear Materials
Volume	544
DOIs	https://doi.org/10.1016/j.jnucmat.2020.152710
State	Published - 1 Feb 2021

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Cite this

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title = "Microstructural evolution in pure and ZrC strengthened tungsten under ion irradiation at 600°C",

abstract = "The microstructural evolution in ultra-fine grain (UFG) tungsten reinforced with ZrC particles under ion irradiation was investigated by transmission electron microscopy and compared to the effect of ion irradiation in reference ITER specification tungsten. Here, we report the evolution of the microstructure under heavy ion irradiation to mimic the neutron irradiation damage taking place in a nuclear fusion environment. The irradiation was performed with 9.1 MeV gold ions at 600°C to reach the end-of-life irradiation dose in ITER and DEMO divertor (i.e. 1 and 5 dpa). The microstructure is investigated by means of transmission electron microscopy. It is found that the ion induced defect structure does not deviate significantly from the reference tungsten. The main defects are a/2<111> type dislocation loops and nano-metric voids. The defect concentration is already saturated at 1 dpa and the higher irradiation damage was not found to have a significant effect on the defect concentration.",

keywords = "Tungsten, Microstructure, Ion irradiation, Fusion",

author = "{Van Renterghem}, Wouter and Dmitry Terentyev and Shanmugam Balaji and Christopher David and Andrii Dubinko and Chao Yin and Tao Zhang",

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T1 - Microstructural evolution in pure and ZrC strengthened tungsten under ion irradiation at 600°C

AU - Van Renterghem, Wouter

AU - Terentyev, Dmitry

AU - Balaji, Shanmugam

AU - David, Christopher

AU - Dubinko, Andrii

AU - Yin, Chao

AU - Zhang, Tao

N1 - Score=10

PY - 2021/2/1

Y1 - 2021/2/1

N2 - The microstructural evolution in ultra-fine grain (UFG) tungsten reinforced with ZrC particles under ion irradiation was investigated by transmission electron microscopy and compared to the effect of ion irradiation in reference ITER specification tungsten. Here, we report the evolution of the microstructure under heavy ion irradiation to mimic the neutron irradiation damage taking place in a nuclear fusion environment. The irradiation was performed with 9.1 MeV gold ions at 600°C to reach the end-of-life irradiation dose in ITER and DEMO divertor (i.e. 1 and 5 dpa). The microstructure is investigated by means of transmission electron microscopy. It is found that the ion induced defect structure does not deviate significantly from the reference tungsten. The main defects are a/2<111> type dislocation loops and nano-metric voids. The defect concentration is already saturated at 1 dpa and the higher irradiation damage was not found to have a significant effect on the defect concentration.

AB - The microstructural evolution in ultra-fine grain (UFG) tungsten reinforced with ZrC particles under ion irradiation was investigated by transmission electron microscopy and compared to the effect of ion irradiation in reference ITER specification tungsten. Here, we report the evolution of the microstructure under heavy ion irradiation to mimic the neutron irradiation damage taking place in a nuclear fusion environment. The irradiation was performed with 9.1 MeV gold ions at 600°C to reach the end-of-life irradiation dose in ITER and DEMO divertor (i.e. 1 and 5 dpa). The microstructure is investigated by means of transmission electron microscopy. It is found that the ion induced defect structure does not deviate significantly from the reference tungsten. The main defects are a/2<111> type dislocation loops and nano-metric voids. The defect concentration is already saturated at 1 dpa and the higher irradiation damage was not found to have a significant effect on the defect concentration.

KW - Tungsten

KW - Microstructure

KW - Ion irradiation

KW - Fusion

UR - https://ecm.sckcen.be/OTCS/llisapi.dll/open/41514895

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DO - 10.1016/j.jnucmat.2020.152710

M3 - Article

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JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

M1 - 152710

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