The development of brazing filler for ITER thermal anchor attachment

Lee, P.Y.; Sun, Zheng; Pan, C.J.; Hou, Bing; Han, S. L.; Pei, Yinyin; Long, Weimin

doi:10.1016/j.fusengdes.2010.12.008

Cited by 2 publications

(3 citation statements)

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“…Any substantial or systematic reproduction, redistribution, reselling, loan, sub-licensing, systematic supply, or distribution in any form to anyone is expressly forbidden. Terms & Conditions of access and use can be found at http:// www.tandfonline.com/page/terms-and-conditions INTRODUCTION Gravity magnet support is one of key components of international thermonuclear experimental reactor (ITER) to sustain the toroidal field (TF) coils, which should endure several large forces, such as dead weight of the whole coils (more than 100MN), electromagnetic force, thermal stress, and seismic loads (in accident) [1][2][3]. Thermal anchor, an extra cooling system, is designed for the TF gravity magnet support to balance the temperature between magnet support basement (flexible plates) and TF magnet [3], as shown in Fig.…”

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confidence: 99%

“…Moreover, the high heat input can remarkably reduce the excellent properties of 316L=316LN stainless steel. It is well known that brazing is a low heat-input welding method [4] which is generally considered to have little effect on the base metal; therefore, the breaking and deformation of thermal anchor can be avoided and controlled as much as possible [3,4]. In recent years, arc brazing was developed as an efficient and energy-saving brazing method.…”

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confidence: 99%

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Effects of Brazing Filler and Method on ITER Thermal Anchor Joint Crack

Chen¹,

Wu²,

Pei³

et al. 2014

Materials and Manufacturing Processes

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Thermal anchor, one of the key components to keep temperature balance of gravity magnet support, should be avoided welding defects in its welding joints, which endure large forces when the international thermonuclear experimental reactor (ITER) fusion device is operating. The influences of brazing fillers and brazing methods on the cracks in joints of thermal anchor were investigated by microstructure analysis. The results have shown that the copper penetrating cracks were observed in the heat-affected zone (HAZ) of tungsten inert gas (TIG) arc brazing joints welded by CuSi3, CuSi3Mn, and Ag45CuSnNi brazing fillers, which are chiefly responsible for the diffusion and penetration of copper, derived from molten brazing filler metal into the 316L/316LN austenitic grain boundaries leading to embrittlement. The intimate contact between liquid copper and austenitic steel surface and the surface stress concentration of the austenitic steel are the main formative factors for the copper penetrating cracks. Adopting brazing fillers without containing copper or employing vacuum brazing can effectively avoid the copper penetrating cracks in the joints of ITER thermal anchor.

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confidence: 99%

Section: Please Scroll Down For Articlementioning

confidence: 99%

Effects of Brazing Filler and Method on ITER Thermal Anchor Joint Crack

Chen¹,

Wu²,

Pei³

et al. 2014

Materials and Manufacturing Processes

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“…This could even quench the superconducting magnet. Some attachment methods for cooling pipe, which ensure sufficient thermal contact with the flexible plates and minimize the risk of leaks, have been researched [6]. The method of connecting the manifolds to the pipes linked with flexible plates is being explored.…”

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confidence: 99%

Preliminary Research of Manufacturing Technology for ITER Magnet Supports

Hou

Yang

et al. 2012

AMM

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The International Thermal Experiment Reactor (ITER) is designed to operate for 20 years with high safety requirements. The magnets with their total weight being about 10,000t sit at the core of the ITER machine. In order to guarantee the safety of the ITER machine, the research of the manufacturing technology for ITER magnet supports (MS) is an indispensable working procedure before the MS are produced. The MS consist of toroidal field (TF) gravity supports (GS), poloidal field (PF) supports and correction coils (CC) supports. This paper summarizes that the preliminary research results for the manufacturing of the GS with thermal anchor, the reliable method to manufacture the U-shaped clamp with tapered slots for PF coil supports and the special devices for test of full-size fasteners used in all the MS.

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The development of brazing filler for ITER thermal anchor attachment

Cited by 2 publications

References 1 publication

Effects of Brazing Filler and Method on ITER Thermal Anchor Joint Crack

Effects of Brazing Filler and Method on ITER Thermal Anchor Joint Crack

Preliminary Research of Manufacturing Technology for ITER Magnet Supports

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