中文版 | English
Title

Laser repair of tungsten damaged by fusion-relevant plasmas

Author
Corresponding AuthorZhu,Qiang
Publication Years
2023-07-01
DOI
Source Title
ISSN
0022-3115
Volume580
Abstract
As a hotspot, the ITER tungsten divertor receives both extreme plasmas and considerable research attention. The projection is that certain plasma-induced defects in tungsten are inevitable under the scheduled ITER operation. Although the exact consequences of such defects on the divertor lifetime are unclear currently, approaches to combat them are desirable but remain limited. Here, we develop the idea of healing such defects through laser remelting. With a suitable combination of processing parameters—such as laser power, scan speed, and preheating temperature—the remelted (pristine) tungsten surface was nearly crack-free. Revealed by electron backscatter diffraction (EBSD) analysis, the remelted microstructure resembled that of fully recrystallized tungsten. Furthermore, the linear relationship between the normalized melt pool depth and the normalized enthalpy of the surface was established, the former of which indicates the healing depth. Lastly, proof-of-principle experiments were performed on damaged tungsten specimens containing respectively blisters, nanostructure fuzz, and fatigue cracks, yielding promising healing effects. Based on additional considerations of the plasma exposure behavior of laser remelted tungsten and deployment of the laser repair system, we conclude that the laser repair approach is compatible with the ITER operation plan.
Keywords
URL[Source Record]
Language
English
SUSTech Authorship
First ; Corresponding
ESI Research Field
ENGINEERING
Scopus EID
2-s2.0-85151661492
Data Source
Scopus
Citation statistics
Cited Times [WOS]:0
Document TypeJournal Article
Identifierhttp://kc.sustech.edu.cn/handle/2SGJ60CL/524098
DepartmentDepartment of Mechanical and Energy Engineering
Affiliation
1.Department of Mechanical and Energy Engineering,Southern University of Science and Technology,Shenzhen,518055,China
2.Shenzhen Key Laboratory for Additive Manufacturing of High-Performance Materials,Shenzhen,518055,China
3.CityU-Shenzhen Futian Research Institute,Shenzhen,518045,China
4.School of Physics,Beihang University,Beijing,100191,China
First Author AffilicationDepartment of Mechanical and Energy Engineering
Corresponding Author AffilicationDepartment of Mechanical and Energy Engineering
First Author's First AffilicationDepartment of Mechanical and Energy Engineering
Recommended Citation
GB/T 7714
Li,Yu,Guo,Chuan,Sun,Yuhan,et al. Laser repair of tungsten damaged by fusion-relevant plasmas[J]. Journal of Nuclear Materials,2023,580.
APA
Li,Yu.,Guo,Chuan.,Sun,Yuhan.,Cheng,Long.,Peng,Jia Guan.,...&Zhu,Qiang.(2023).Laser repair of tungsten damaged by fusion-relevant plasmas.Journal of Nuclear Materials,580.
MLA
Li,Yu,et al."Laser repair of tungsten damaged by fusion-relevant plasmas".Journal of Nuclear Materials 580(2023).
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