Reimplantation of supporting legs on EAST divertor by electron beam brazing

IF 2.3 2区物理与天体物理 Q1 NUCLEAR SCIENCE & TECHNOLOGY Nuclear Materials and Energy Pub Date : 2025-03-10 DOI:10.1016/j.nme.2025.101918

Yu Tian , Yu-Ping Xu , Chang Xu , Wu-Qingliang Peng , An-Bang Wu , Jian-Ping Qu , Fang-Yong Du , Peng-Fei Zi , Qiang Li , Wan-Jing Wang , Hai-Shan Zhou , Guang-Nan Luo

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引用次数: 0

Abstract

The supporting legs at the back of the ITER-like W/Cu monoblock in the upper divertor of the Experimental Advanced Superconducting Tokamak (EAST) were found fractured due to the influence of electromagnetic forces, vertical displacement events (VDEs) and its own weight. This study developed an electron beam brazing (EBB) technique for the reimplantation of supporting legs. Defect-free bonding between Inconel 625 (IN625) alloy and pure tungsten was obtained with the tensile strength exceeding 110 MPa. Microstructural analysis revealed a columnar grain structure on the tungsten side and finer grains on the IN625 side. Nanoindentation tests indicated that the brazed interface exhibited a lower average stiffness of 1660 μN/nm and a lower average hardness of 1.48 GPa, ensuring enhanced plasticity and improved load-bearing capacity. This work provides a novel proposal to reimplant supporting legs on divertor components by EBB in terms of achieving microstructural refinement and high strength.

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来源期刊

Nuclear Materials and Energy Materials Science-Materials Science (miscellaneous)

CiteScore

3.70

自引率

15.40%

发文量

175

审稿时长

20 weeks

期刊介绍： The open-access journal Nuclear Materials and Energy is devoted to the growing field of research for material application in the production of nuclear energy. Nuclear Materials and Energy publishes original research articles of up to 6 pages in length.