Method of Fracture Toughness Estimation in Corrosive Media in Conditions of Long-Term Static Loading

Abstract

Critical analysis of the methods of testing for fracture toughness in corrosive media under long-term load is presented. Bearing in mind the shortcomings of the known methods, we develop a technique for estimating the fracture toughness of structural materials in corrosive media under the impact of a long-term static load which is set with a high accuracy on testing machine and then fixed with a spacer bolt. The method provides determination of the effective load in the sample at any time of the exposure, which predetermines the possibility of studying the kinetics of corrosion attack and change in the fracture toughness in conditions of prolonged static loading and corrosive media.