The dynamical mechanical properties of tungsten under compression at working temperature range of divertors

JOURNAL OF NUCLEAR MATERIALS

卷:469

Article

Zhu, C. C.^1,2  Song, Y. T.^1,2  Peng, X. B.²  Wei, Y. P.³  Mao, X.²  Li, W. X.¹  Qian, X. Y.¹ 

[1] Univ Sci & Technol China, Sch Nucl Sci & Technol, Hefei 230026, Peoples R China

[2] Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China

[3] Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China

关键词: Tungsten;    Electromagnetic loads;    Dynamic mechanical compressive behavior;    Constitutive equation;    Divertor;   

DOI  :  10.1016/j.jnucmat.2015.11.045

来源: Elsevier

【 摘 要 】

In the divertor structure of ITER and EAST with mono-block module, tungsten plays not only a role of armor material but also a role of structural material, because electromagnetic (EM) impact will be exerted on tungsten components in VDEs or CQ The EM loads can reach to 100 MN, which would cause high strain rates. In addition, directly exposed to high-temperature plasma, the temperature regime of divertor components is complex. Aiming at studying dynamical response of tungsten divertors under EM loads, an experiment on tungsten employed in EAST divertors was performed using a Kolsky bar system. The testing strain rates and temperatures is derived from actual working conditions, which makes the constitutive equation concluded by using John-Cook model and testing data very accurate and practical. The work would give a guidance to estimate the dynamical response, fatigue life and damage evolution of tungsten divertor components under EM impact loads. (C) 2015 Elsevier B.V. All rights reserved.

【 授权许可】

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