Fracture Strength of Explosive Clad Steel with Surface Notch

概要

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Fracture performance of an explosive clad steel composed of 5US304 stainless steel and HT80 high strength steel is investigated. To clarify the effects of composite structures and metallurgical properties on the fracture strength and the fracture strain, tensile tests are carried out by using homogeneous and heterogeneous specimens which are extracted from the clad plate and have an artificial surface notch. The critical value of stress for the macroscopic unstable fracture initiation of the heterogeneous specimen with a surface notch in SUS3O4 steel is larger than that of the homogeneous SUS3O4 steel specimen over all the test temperature range, and also larger than that of the homogeneous HT8O steel specimen at a very low temperature. The fracture strain of the heterogeneous specimen with a surface notch in SUS3O4 steel lies between that of the homogeneous SUS3O4 steel specimen and that of the homogeneous HT8O steel specimen over all the test temperature range. The critical crack mouth opening displacement of the heterogeneous specimen with a surface notch in SUS3O4 steel is lower than that of the homogeneous SU5304 steel specimen.
社団法人溶接学会の論文
1985-10-01