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Report No.

Pitting damage in metals by mercury cavitation with MIMTM

Yoshiie, Toshimasa*; Futakawa, Masatoshi  ; Naoe, Takashi   ; Komatsu, Masao*; Sato, Koichi*; Xu, Q.*; Kawai, Masayoshi*

In the liquid mercury target for the spallation neutron source, pressure waves occurs owing to the high-intense proton beam bombardment. The pressure waves induces the cavitation in the interface between the mercury and the target vessel through the propagation process. Erosion damage composed of micro-pits clusters is formed by the micro-jets and shock waves emitted from cavitation bubble collapse. In this paper, researches for damage structure of the material that was examined using the electroMagnetic IMpact Testing Machine (MIMTM) form the viewpoint of high-speed deformation. The result showed that the 200$$sim$$300 m/s of collision velocity for micro-jet impacting which was estimated from the numerical simulation is reasonable value.



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