点击次数：

论文类型：期刊论文

发表时间：2017-12-01

发表刊物：16th International Conference on Plasma-Facing Materials and Components for Fusion Applications

收录刊物：SCIE、CPCI-S

卷号：T170

ISSN号：0031-8949

关键字：W-Y2O3; plasma facing material; high-energy-rate forging; tensile properties; thermal shock resistance

摘要：The effects of the addition of Y2O3 and hot-deformation on the mechanical properties of tungsten (W) have been studied. The processing route comprises a doping technique for the distribution of Y2O3 particles in a tungsten matrix, conventional sintering in a hydrogen environment, and high-energy-rate forging (HERF). The microstructure of the composite was characterized by using transmission electron microscopy and electron backscattering diffraction imaging technique, and its mechanical properties were studied by means of tensile testing. The thermal shock response of the HERF processed W-Y2O3 was evaluated by applying edge-localized mode-like loads (100 pulses) with a pulse duration of 1 ms and an absorbed power density of up to 1 GWm(-2) at various temperatures between room temperature and 200 degrees C. HERF processing has produced elongated W grains with preferred orientations and a high density of structure defects in the composite. The composite material exhibits high tensile strength and good ductility, and a thermal shock cracking threshold lower than 100 degrees C.