Abstract
This paper showed the fatigue strength of load-carrying type and non load-carrying type fillet welded joints used SUS304A austenitic stainless steel, especially fatigue strength of corroded welded joint by salty environment.The main results of fatigue tests were as follows:(1)The 2x106 fatigue strength of load-carrying type fillet welded joints were 64MPa for non-corroded specimens and 61MPa for corroded ones respectively, however over 100MPa stress ranges, fatigue strength of the latter were lower than those of the former. (2) The 2x106 fatigue strength of non load-carrying type fillet welded joints were 101MPa for non-corroded specimens and 67MPa for corroded ones respectively. (3) The deterioration of fatigue strength of corrode specimens were caused by stress corrosion cracks which occurred in the heat-affected-zone by salty environment and residual stress of welding.
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