Erosion damage on solid boundaries in contact with liquid metals by impulsive pressure injection
Erosion damage on solid boundaries in contact with liquid metals by impulsive pressure injection
复制标题
脉冲压力注入对与液态金属接触的固体边界的侵蚀损伤
DOI：
10.1016/s0734-743x(02)00054-4
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发表时间：
2003
影响因子：
5.1
通讯作者：
H. Takeishi
中科院分区：
文献类型：
--
作者：
M. Futakawa;H. Kogawa;R. Hino;H. Date;H. Takeishi
日本原子能研究所正在研究和开发建造一个散裂中子源设施，这可能会带来创新的科学领域。高功率质子束将被注入液体汞靶以产生中子。因此，汞容器将受到快速热膨胀产生的压力波的影响。压力波将从液态汞传播到固体金属容器，然后再传播回来。在一定的载荷条件下，压力波会在固体金属容器与液态汞的界面处引起侵蚀，例如撞击。为了研究压力波对冲击侵蚀损伤的影响，采用改进的传统分离式霍普金森压杆装置对汞填充小室进行了冲击实验。水银室由输入、输出条和项圈组成。将直径16mm，厚度5mm的圆盘试样（A6061, 316SS， Inconel 600和马氏体时效钢）放置在与汞接触的两根棒的两端。当压力波为40和80MPa时，表面出现了许多凹坑形式的退化，压力波明显低于这些金属的屈服应力。损伤等级为A6061>316SS × Inconel 600>马氏体时效钢。特别是A6061在100次撞击后完全断裂。
The Japan Atomic Energy Research Institute is carrying out research and development to construct a spallation neutron source facility, which may bring innovative science fields. A high-power proton beam will be injected into a liquid-mercury target to produce neutrons. The mercury vessel will consequently be subjected to the pressure waves generated by rapid thermal expansion. The pressure waves will propagate from the liquid mercury into the vessel solid metal, and back again. The pressure waves may induce erosion at the interface between the solid metal vessel and the liquid mercury under certain loading conditions, e.g. impact. In order to investigate the impact erosion damage due to the pressure wave, we have carried out impact experiments using a modified conventional split Hopkinson pressure bar apparatus on mercury filling a small chamber. The chamber for the mercury consists of the input, the output bars and a collar. Disk specimens of 16mm diameter and 5mm thickness (A6061, 316SS, Inconel 600 and Maraging steel) were placed on the ends of both bars in contact with mercury. Surface degradation in the form of many pits was observed for pressure waves of 40 and 80MPa, which are significantly lower than the yield stress of these metals. The ranking order of damage was found to be A6061>316SS≅Inconel 600>Maraging steel. In particular, A6061 fractured completely after 100 impacts.