Study on damage behavior of the outer horizontal target in the EAST lower divertor after plasma operations

Gang Yao; Xu Shen; Jia-Qin Liu; Xiao-Yong Zhu; Lai–Ma Luo; Yu–Cheng Wu

Nuclear Materials and Energy (Jun 2024)

Study on damage behavior of the outer horizontal target in the EAST lower divertor after plasma operations

Gang Yao,
Xu Shen,
Jia-Qin Liu,
Xiao-Yong Zhu,
Lai–Ma Luo,
Yu–Cheng Wu

Affiliations

Gang Yao: School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China; Engineering Research Center of High Performance Copper Alloy Materials and Processing, Ministry of Education, Hefei 230009, China
Xu Shen: School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China; Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China; Anhui Key Laboratory of Special Welding Technology, Huainan, 232000, China; Corresponding authors at: School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China.
Jia-Qin Liu: Institute of Industry and Equipment Research, Hefei University of Technology, Hefei 230009, China; Research Center of Advanced Composites Design and Application Engineering of Anhui Province, Hefei 230051, China; Corresponding authors at: School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China.
Xiao-Yong Zhu: Institute of Intelligent Manufacture, Hefei University of Technology, Hefei 230051, China; National-Local Joint Engineering Research Centre of Nonferrous Metals and Processing Technology, Hefei 230009, China
Lai–Ma Luo: School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China; Engineering Research Center of High Performance Copper Alloy Materials and Processing, Ministry of Education, Hefei 230009, China; National-Local Joint Engineering Research Centre of Nonferrous Metals and Processing Technology, Hefei 230009, China
Yu–Cheng Wu: School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China; Engineering Research Center of High Performance Copper Alloy Materials and Processing, Ministry of Education, Hefei 230009, China; National-Local Joint Engineering Research Centre of Nonferrous Metals and Processing Technology, Hefei 230009, China; Corresponding authors at: School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China.

Journal volume & issue: Vol. 39
p. 101640

Abstract

Read online

The EAST lower divertor features a partially implemented flat-type structure, and visible damage has been observed, particularly at the outer horizontal target location after plasma operations. This study conducts a detailed analysis of the damage to the outer horizontal target. The findings reveal instances of plastic deformation, cracking, and even tungsten flake detachment at specific locations on the outer horizontal target. Furthermore, different degrees of recrystallization are identified in the tungsten plates after plasma operations, with a more pronounced effect closer to the surface of the tungsten plates. These observations offer pertinent insights for ongoing research into the microstructural enhancement design of tungsten materials and the enhancement of crack thresholds at the W/Cu interface.

Published in Nuclear Materials and Energy

ISSN: 2352-1791 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Nuclear engineering. Atomic power
Website: http://www.journals.elsevier.com/nuclear-materials-and-energy/

About the journal

Abstract

Keywords