Microstructure and damage behavior of W–Cr alloy under He irradiation

In this study, a large-power inductively coupled plasma source was designed to perform the continuous helium ion irradiations of W–Cr binary alloy (W–20 wt%Cr) under relevant conditions of the International Thermonuclear Experimental Reactor. Surface damages and microstructures of irradiated W–20Cr...

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Bibliographic Details
Published in:Journal of nuclear materials 2018-04, Vol.501, p.181-188
Main Authors: Huang, Ke, Luo, Lai–Ma, Zan, Xiang, Xu, Qiu, Liu, Dong–Guang, Zhu, Xiao–Yong, Cheng, Ji–Gui, Wu, Yu–Cheng
Format: Article
Language:English
Subjects:
Alloys
Binary alloys
Chromium base alloys
Damage assessment
Energy dispersive X ray spectroscopy
Energy transmission
He irradiation behavior
Helium
Helium ions
Inductively coupled plasma
Interface
Irradiation
Microhardness
Microstructure
Radiation damage
Scanning electron microscopy
Spectrum analysis
Transmission electron microscopy
Tungsten
W-Cr alloy
X-ray spectroscopy
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Summary:In this study, a large-power inductively coupled plasma source was designed to perform the continuous helium ion irradiations of W–Cr binary alloy (W–20 wt%Cr) under relevant conditions of the International Thermonuclear Experimental Reactor. Surface damages and microstructures of irradiated W–20Cr were observed by using scanning electron microscopy, energy-dispersive X-ray spectroscopy, and transmission electron microscopy. The addition of Cr dramatically enhanced the micro-hardness of the obtained bulk materials, and the interface between the W matrix and the second phase Cr–O is a semi-coherent interface. After irradiation, the doping of Cr element effectively reduces the damage of the W matrix during the irradiation process. The semi-coherent interface between the second phase and the W matrix improves the anti-irradiation performance of the W–20Cr alloy.
ISSN:0022-3115
1873-4820
DOI:10.1016/j.jnucmat.2018.01.019