Basic Study for Destruction of Cryogenic Pressure Vessel By Shock Wave

Abstract

In recent years, a use for cryogenic fluids as a coolant has been increasing because of the industrial development of low temperature technology. Therefore, the use of the cryogenic pressure vessel becomes general. LNG-tank, LN2, O2-tank at food factory and medical facilities are given for example. The shock tolerance of the various material under cryogenic temperature region that consist cryogenic pressure vessel is necessary with considering about them safety. The fact that material becomes fragile when it becomes a low temperature has already been known. Property of material in the temperature area of −200°C and under aren’t known very much. Therefore, we carried out experiments, which test piece are exposed to shock wave under cryogenic temperature region, and investigated destruction of test piece. The breaking surface of test piece was observed by using of the SEM. Structure of material was observed by an optical microscope.