Abstract
TRIP steels manifest a high ductility and a high impact energy absorption characteristic because of strain-induced martensitic transformatioa Recently, some shock absorption members are being used for automobile industries. If it is possible that TRIP steels are applied to the shock absorption members, those members might possess much more high performance. An energy absorption characteristic and a fracture toughness of TRIP steels under impact loading should be clarified. A purpose of the present study is to clarify the energy absorption characteristic and the fracture toughness subjected to impact loading. To achieve this aim, first, a prototype of a small punch test apparatus is established for a quasi-static and impact loading. The energy absorption characteristic and the elasto-plastic fracture toughness are investigated by using the established apparatus.
