Fracture of welded samples of small sizes in repeated heating under different conditions of thermomechanical action

Presented are the results of tests of welded specimens of heat-resistant steels on tendency to fracture at repeated heating during the following thermomechanical procedures (under isothermal conditions): at constant stresses, at constant deformation rate, in the regime of stress relaxation at variable initial values of potential energy. The test results show that in all cases within the subcrytical temperature range the brittle intercrystallic fractures are reproducible