Mechanistic aspects of delayed fracture of thin high strength plate subjected to sustained loading

Abstract

A study on the delayed fracture behavior of high strength steel induced by hydrogen was carried out using thin plate specimens. of which stress state would be plane stress condition, to compare them with solid round bar specimens that were subjected to plane strain condition. The specimens were cathordically charged with hydrogen under sustained load conditions. The delayed fracture time of thin plate specimens lasts longer than the solid bar specimens. As the thickness of the plate specimens became thin, the delayed fracture time showed the tendency that became long.