Surface cracking of tungsten-vanadium alloys under transient heat loads

Nuclear Materials and Energy

Zhang-Jian Zhou¹  Zheng Wang²  Guang-Hong Lu²  Yue Yuan²  Dan Ding²  Ying Zhang²  Kameel Arshad²  Jun Wang²  Xiang Liu³ 

[1] School of Materials Science and Engineering, University of Science and Technology Beijing (USTB), Beijing 100083, China;School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, China;Southwestern Institute of Physics, P.O. Box 432, Chengdu 610041, Sichuan, China;

关键词: W-V alloys;    Plasma facing materials;    Transient heat loads;    Surface cracking;   

DOI  :  10.1016/j.nme.2015.05.001

来源: DOAJ

【 摘 要 】

To evaluate high heat load performance of tungsten-vanadium (W-V) alloys as a potential candidate for plasma facing materials of fusion devices, the target materials with three different V concentrations (1, 5 and 10 wt%) are exposed to thermal shock loading. The alloys are fabricated by cold isostatic pressing and subsequently sintered in a vacuum furnace. Thereafter, they are exposed to different high heat flux densities ranging from 340 to 675 MW/m2 for single shot of 5 ms duration in an intense electron beam test facility. The alloys with lowest V concentration (1 wt%) are highly damaged in form of seriously cracking. The ones with intermediate V content (5 wt%) has shown comparatively better performance than both highest and lowest V contents alloys. The results indicate that improved mechanical properties and reduced thermal conductivity due to V addition comprehensively affect the cracking behavior of W-V alloy under transient thermal shock.

【 授权许可】

Unknown