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The Routes and Mechanism of Plasma Facing Tungsten Materials to Improve Ductility |
Yucheng WU1,2,3() |
1 School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China 2 National-Local Joint Engineering Research Centre of Nonferrous Metals and Processing Technology, Hefei University of Technology, Hefei 230009, China 3 Key Laboratory of Interface Science and Engineering of New Materials, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China |
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Cite this article:
Yucheng WU. The Routes and Mechanism of Plasma Facing Tungsten Materials to Improve Ductility. Acta Metall Sin, 2019, 55(2): 171-180.
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Abstract As a candidate for plasma facing material (PFM) in nuclear fusion situation, polycrystalline W with a characteristic of bad low temperature ductility shows brittle behaviour at room temperature and possesses a high ductile-to-brittle transition temperature, which limits its engineering application. In this paper, several common methods of grain refinement, addition of alloying elements, second-phase particles and tungsten fibre, and deformation processing for improving ductility of W are illustrated. To in-depth comprehend of how to improving W toughening, these toughening methods are discussed from intrinsic or extrinsic toughening mechanisms. Furthermore, the research status and development prospects for improving ductility of W materials have been presented.
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Received: 31 August 2018
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Fund: Supported by Magnetic Confinement Fusion Program of National Key Basic Research Program of China (No.2014-GB121001B), National Natural Science Foundation of China (Nos.51474083, 51574101, 51674095 and 51675154) and Program of Introducing Talents of Discipline to Universities of China (No.B18018) |
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