OS2138 Evaluation of High Temperature Fatigue Crack Growth of SUS304 under Multiaxial Loading Conditions and Examination on Crack Initiation Life and Fatigue Life

Abstract

Under multiaxial loading conditions, high temperature fatigue crack growth tests for SUS 304 stainless steel was conducted. DC electrical potential drop method was applied to thin-walled cylindrical specimen subjected cyclic tension and torsion. Crack initiation life, N_i, crack propagation life, N_p, and fatigue life, N_f were evaluated and effects of combined stress condition, Δτr/Δσ, phase difference of loading waveform and shape of slit on the life, N_i, N_p and N_f are examined. These experimental results were discussed with the results of elastic-creeping FE analyses.